Publications

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Journal Articles

Collins, G. C., W. B. McKinnon, J. M. Moore, F. Nimmo, R. T. Pappalardo, L. M. Prockter, and P. M. Schenk, Tectonics of the outer planet satellites (book chapter), Solar System Tectonics (T. Watters and R. Schultz, eds.), Cambridge, in press, 2008.

Wahr, J., Z. A. Selvans, M. E. Mullen, A. C. Barr, G. C. Collins, M. M. Selvans, and R. T. Pappalardo, Modeling stresses on satellites due to non-synchronous rotation and orbital eccentricity using gravitational potential theory, Icarus, submitted, 2008.

Collins, G. C., and J. C. Goodman, Enceladus' south polar sea, Icarus 189, 72-82, 2007.

Collins, G. C., and T. V. Johnson, Ganymede and Callisto (book chapter), Encyclopedia of the Solar System, 2nd Edition (L. A. McFadden, P. R.Weissman, and T. V. Johnson, eds.), 449-466, Academic Press, 2007.

Burr, D. M., J. P. Emery, R. D. Lorenz, G. C. Collins, and P. A. Carling, Sediment transport by liquid surficial flow: Application to Titan, Icarus 181, 235-242, 2006.

Collins, G. C., Relative rates of fluvial bedrock incision on Titan and Earth, Geophysical Research Letters 32, L22202, doi:10.1029/2005GL024551, 2005.

Pappalardo, R. T., and G. C. Collins, Strained craters on Ganymede, Journal of Structural Geology 27, 827-838, 2005.

Gilmore, M. S., G. C. Collins, L. S. Crumpler, J. A. Cutts, A. V. deCharon, J. W. Head, K. T. Nock, M. Parry, and R. A. Yingst, Investigation of the application of aerobot technology at Venus, Acta Astronautica 56, 477-494, 2005.

Goodman, J. C., G. C. Collins, J. Marshall, and R. T. Pierrehumbert, Hydrothermal plume dynamics on Europa: Implications for chaos formation, Journal of Geophysical Research 109, E03008, 2004.

Pappalardo, R. T., G. C. Collins, J. W. Head, P. Helfenstein, T. McCord, J. M. Moore, L. M. Prockter, P. M. Schenk, and J. Spencer, Geology of Ganymede (book chapter), Jupiter: Planet, Satellites, and Magnetosphere (F. Bagenal, T. Dowling, and W. McKinnon, eds.), 363-396, Cambridge University Press, 2004.

Head, J. W., R. T. Pappalardo, G. C. Collins, M. J. S. Belton, B. Giese, R. Wagner, H. H. Breneman, N. A. Spaun, B. Nixon, G. Neukum, and J. Moore, Evidence for Europa-like resurfacing styles on Ganymede, Geophysical Research Letters 29, 2151, 2002.

Moore, J. M., E. Asphaug, M. J. S. Belton, B. Bierhaus, H. H. Breneman, S. M. Brooks, C. R. Chapman, F. C. Chuang, G. C. Collins, B. Giese, R. Greeley, J. W. Head, S. Kadel, K. Klaasen, J. E. Klemaszewski, K. P. Magee, J. Moreau, D. Morrison, G. Neukum, R. T. Pappalardo, C. B. Phillips, P. M. Schenk, D. A. Senske, R. J. Sullivan, E. P. Turtle, and K. K. Williams, Impact features on Europa: Results of the Galileo Europa Mission (GEM), Icarus 151, 93-111, 2001.

Prockter, L. M., P. Figueredo, R. T. Pappalardo, J. W. Head III, and G. C. Collins, Geology and mapping of dark terrain on Ganymede and implications for grooved terrain formation, Journal of Geophysical Research 105, 22,519-22,540, 2000.

Greeley, R., P. H. Figueredo, D. A. Williams, F. C. Chuang, J. E. Klemaszewski, S. D. Kadel, L. M. Prockter, R. T. Pappalardo, J. W. Head III, G. C. Collins, N. A. Spaun, R. J. Sullivan, J. M. Moore, D. A. Senske, B. R. Tufts, T. V. Johnson, M. J. S. Belton, and K. L. Tanaka, Geologic mapping of Europa, Journal of Geophysical Research 105, 22,559-22,578, 2000.

Collins, G. C., J. W. Head, R. T. Pappalardo, and N. A. Spaun, Evaluation of models for the formation of chaotic terrain on Europa, Journal of Geophysical Research 105, 1709-1716, 2000.

Collins, G. C., J. W. Head, A. T. Basilevsky, and M. A. Ivanov, Evidence for rapid regional plains emplacement on Venus from the population of volcanically embayed impact craters, Journal of Geophysical Research 104, 24,121-24,139, 1999.

Pappalardo, R. T., M. J. S. Belton, H. H. Breneman, M. H. Carr, C. R. Chapman, G. C. Collins, T. Denk, S. Fagents, P. E. Geissler, B. Giese, R. Greeley, R. Greenberg, J. W. Head, P. Helfenstein, G. Hoppa, S. D. Kadel, K. P. Klaasen, J. E. Klemaszewski, K. Magee, A. S. McEwen, J. M. Moore, W. B. Moore, G. Neukum, C. B. Phillips, L. M. Prockter, G. Schubert, D. A. Senske, R. J. Sullivan, B. R. Tufts, E. P. Turtle, R. Wagner, and K. K. Williams, Does Europa have a subsurface ocean?  Evaluation of the geological evidence, Journal of Geophysical Research 104, 24,015-24,055, 1999.

Patel, J. G., R. T. Pappalardo, J. W. Head, G. C. Collins, H. Hiesinger, and J. Sun, Topographic wavelengths of Ganymede groove lanes from Fourier analysis of Galileo images, Journal of Geophysical Research 104, 24,057-24,074, 1999.

Prockter, L. M., A. Antman, R. T. Pappalardo, J. W. Head, G. C. Collins, and the Galileo SSI Team, Europa: Stratigraphy and geological history of an anti-Jovian region from Galileo E14 solid-state imaging data, Journal of Geophysical Research 104, 16,531-16,560, 1999.

Collins, G. C., J. W. Head, and R. T. Pappalardo, The role of extensional instability in creating Ganymede grooved terrain: Insights from Galileo high-resolution stereo imaging, Geophysical Research Letters 25, p. 233-236, 1998.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Formation of Ganymede grooved terrain by sequential extensional episodes: Implications of Galileo observations for regional stratigraphy, Icarus 135, 345-359, 1998.

Gilmore, M. S., G. C. Collins, M. A. Ivanov, L. Marinangeli, and J. W. Head, Style and sequence of extensional structures in tessera terrain, Venus, Journal of Geophysical Research 103, 16,813-16,840, 1998.

Pappalardo, R. T., J. W. Head, G. C. Collins, R. L. Kirk, G. Neukum, J. Oberst, B. Giese, R. Greeley, C. R. Chapman, P. Helfenstein, J. M. Moore,. A. McEwen, B. R. Tufts, D. A. Senske, H. H. Breneman, and K. Klaasen, Grooved terrain on Ganymede: First results from Galileo high-resolution imaging, Icarus 135, 276-302, 1998.

Spaun, N. A., J. W. Head, G. C. Collins, L. M. Prockter, and R. T. Pappalardo, Conamara Chaos region, Europa: Reconstruction of mobile ice polygons, Geophysical Research Letters, 25 , 4277-4280, 1998.

Belton, M. J. S., J. W. Head III, A. P. Ingersoll, R. Greeley, A. S. McEwen, K. P. Klaasen, D. Senske, R. Pappalardo, G. Collins, A. R. Vasavada, R. Sullivan, D. Simonelli, P. Geissler, M. H. Carr, M. E. Davies, J. Veverka, P. J. Gierasch, D. Banfield, M. Bell, C. R. Chapman, C. Anger, R. Greenberg, G. Neukum, C. B. Pilcher, R. F. Beebe, J. A. Burns, F. Fanale, W. Ip, T. V. Johnson, D. Morrison, J. Moore, G. S. Orton, P. Thomas, and R. A. West, Galileo's first images of Jupiter and the Galilean satellites, Science 274, p. 377-385, 1996.

Montanari, A., P. Sandroni, A. Clymer, G. Collins, R. Coccioni, L. Lanci, and W. Lowrie, Preliminary report on a core drilled across the Eocene-Oligocene boundary in the type locality of Massignano (Italy): The Massicore, Odin, G. S. (ed.), Phanerozoic Time Scale, Bull. Liais. Inform. IUGS Subcomm. Geochron., 12, p. 13-16, 1994.

Conference Abstracts

Asterisks (*) denote my research students

Collins, G. C., L. S. Sklar, B. Zygielbaum, and P. Polito, Laboratory investigations relevant to the erosion of ice on Titan, Science of Solar System Ices Workshop, #9020, 2008.

Sklar, L. S., P. Polito, B. Zygielbaum, and G. C. Collins, Abrasion susceptibility of ultra-cold water ice: Preliminary measurements of abrasion rate, tensile strength, and elastic modulus, Science of Solar System Ices Workshop, #9076, 2008.

Collins, G. C., Driving mechanisms for grooved terrain formation on Ganymede: Comparison of theory to global groove database, LPSC XXXIX, #2254, 2008.

Goff-Pochat, N.*, H. B. di Cicco*, R. L. Michaud*, and G. C. Collins, Searching for strained craters on Enceladus, LPSC XXXIX, #1773, 2008.

Kay, J. P.*, and G. C. Collins, Using discharge and precipitation to estimate runoff coefficients on Titan, LPSC XXXIX, #2203, 2008.

Michaud, R. L.*, R. T. Pappalardo, and G. C. Collins, Pit chains on Enceladus: A discussion of their origin, LPSC XXXIX, #1678, 2008.

Prockter, L., D. Senske, G. C. Collins, J. F. Cooper, A. Hendrix, C. Hibbitts, M. Kivelson, G. Schubert, A. Showman, E. Turtle, and D. Williams, The Jupiter System Observer: Exploring the origins of planetary systems, Bull. AAS 39, 28.03, 2007.

Senske, D., L. Prockter, G. Collins, J. Cooper, A. Hendrix, K. Hibbitts, M. Kivelson, G. Orton, G. Schubert, A. Showman, E. Turtle, D. Williams, J. Kwok, T. Spilker, and G. Tan-Wang, The Jupiter System Observer: Probing the foundations of planetary systems, Eos Trans. AGU, Fall Meet. Suppl., P21B-0531, 2007.

Collins, G. C., Bright terrain tectonics and the evolution of Ganymede, Workshop on Ices, Oceans, and Fire: Satellites of the Outer Solar System, #6041, 2007.

Michaud, R. L.*, R. T. Pappalardo, and G. C. Collins, Measuring tectonic strain: From Ganymede to Enceladus and Dione, Workshop on Ices, Oceans, and Fire: Satellites of the Outer Solar System, #6060, 2007.

Collins, G. C., Classification and time sequence sorting of a Ganymede global grooved terrain database, LPSC XXXVIII, #1999, 2007.

Collins, G. C., and J. C. Goodman, A south polar sea on Enceladus?, LPSC XXXVIII, #1504, 2007.

Kay, J. P.*, G. C. Collins, and G. W. Patterson, Comparison of crater classification schemes on Ganymede, LPSC XXXVIII, #2392, 2007.

Michaud, R. L.*, and G. C. Collins, Comparison of strain measurement methods on Ganymede grooved terrain: Deformed craters vs. fault geometry, LPSC XXXVIII, #1500, 2007.

Patterson, G. W., J. W. Head, G. C. Collins, R. T. Pappalardo, L. M. Prockter, and B. K. Lucchitta, A global geologic map of Ganymede, LPSC XXXVIII, #1098, 2007.

Young, A.*, N. Ralton*, S. Clarke*, G. Collins, and J. Benoit, Impact of urbanization on water quality in the Blackstone river basin, 5th New England Environmental Research Symposium, 2006.

Collins, G. C., and J. C. Goodman, Internal melting and the shape of Enceladus, Bull. AAS 38, #3, 18.03, 2006.

Crawford, Z. A., D. Gleason, R. T. Pappalardo, G. Collins, and M. Weller, Computer assisted stratigraphic sorting of geologic features on Europa and other planetary surfaces, Bull. AAS 38, #3, 30.08, 2006.

Prockter, L., K. Hibbitts, P. Schultz, C. Lisse, D. Dunham, K. Meech, C. Paranicas, and G. Collins, Deep Impact at Europa: A hypervelocity impact mission for astrobiology, Bull. AAS 38, #3, 45.06, 2006.

Montési, L. G. J., M. D. Behn, G. Corti, and G. C. Collins, What controls graben spacing and morphology? Geophysical Research Abstracts 8, 00976, 2006.

Hibbitts, C., P. Schultz, C. Lisse, D. Dunham, C. Paranicas, L. Prockter, K. Meech, and G. Collins, A new mission concept for sampling organic materials on icy satellites: A Europa focus, Astrobiology Science Conference, #258, 2006.

Collins, G. C., Global expansion of Ganymede derived from strain measurements in grooved terrain, LPSC XXXVII, #2077, 2006.

Martin, E. S.*, G. C. Collins, Z. A. Crawford, and R. T. Pappalardo, Computer assisted time sequence sorting of grooves in eastern Mysia Sulci, Ganymede, LPSC XXXVII, #1204, 2006.

Patterson, G. W., J. W. Head, G. C. Collins, R. T. Pappalardo, L. M. Prockter, and B. K. Lucchitta, Global geologic mapping of Ganymede light and dark material at 1:15M, LPSC XXXVII, #1724, 2006.

Collins, G. C., Incision of fluvial channels on Titan, Eos Trans. AGU 86(52), Fall Meet. Suppl., H31G-05, 2005.

Turtle, E., J. Barnes, B. Buratti, G. Collins, S. Fussner, R. Lopes, R. Lorenz, J. Lunine, T. McCord, A. McEwen, R. Nelson, J. Perry, C. Porco, L. Soderblom, C. Sotin, and S. Wall, Exploring the surface of Titan with Cassini-Huygens, Eos Trans. AGU 86(52), Fall Meet. Suppl., P44A-01, 2005.

Burr, D. M., J. P. Emery, R. D. Lorenz, G. Collins, and P. A. Carling, Theoretical calculations of sediment transport by overland flow on Titan, Bull. AAS 37, #3, 46.05, 2005.

McEwen, A., E. Turtle, J. Perry, D. Dawson, S. Fussner, G. Collins, C. Porco, and T. Johnson, Mapping and monitoring the surface of Titan, Bull. AAS 37, #3, 53.04, 2005.

Patterson, G. W., J. W. Head, G. C. Collins, R. T. Pappalardo, L. M. Prockter, and B. K. Lucchitta, Mapping Ganymede at 1:15M: A progress report, PGG Planetary Mappers Meeting, 2005.

McEwen, A., E. Turtle, J. Perry, S. Fussner, C. Porco, R. West, G. Collins, and the Cassini ISS Team, Mapping global albedo patterns on Titan, Workshop on Titan after the Huygens and first Cassini encounters, 2005.

Turtle, E. P., A. McEwen, J. Perry, L. Dones, E. Hardegree-Ullman, S. Fussner, C. Porco, R. West, G. Collins, and the Cassini ISS Team, Initial interpretations of Titan’s geology from Cassini’s Imaging Science Subsystem, Workshop on Titan after the Huygens and first Cassini encounters, 2005.

McEwen, A. S., E. Turtle, J. Perry, S. Fussner, C. Porco, R. West, T. V. Johnson, G. C. Collins, T. DelGenio, J. Barbara, and the Cassini ISS Team, Cassini imaging results at Titan, LPSC XXXVI, #1968, 2005.

Montési, L. G. J., and G. C. Collins, On the mechanical origin of two-wavelength tectonics on Ganymede, LPSC XXXVI, #2093, 2005.

Patterson, G. W., J. W. Head, G. C. Collins, R. T. Pappalardo, L. M. Prockter, and B. K. Lucchitta, Geological mapping of Ganymede, LPSC XXXVI, #1068, 2005.

Collins, G. C., and R. T. Pappalardo, Measuring strain across fault zones on Ganymede, Eos Trans. AGU, F10218, 2004.

Crawford, Z., M. Stempel, A. Barr, D. Gleeson, R. Guryn, R. Pappalardo, J. Wahr, G. Collins, and P. Figueredo, Quantitative modeling of lineament history and stresses on Europa, GSA Ann. Mtg. Abstracts, 52-6, 2004.

Patterson, G. W., J. W. Head, G. C. Collins, R. T. Pappalardo, L. M. Prockter, B. K. Lucchitta, and J. Savage*, Geological mapping of Ganymede: A progress report, PGG Planetary Mappers Meeting, 2004.

Collins, G. C., L. M. Prockter, R. Fontaine*, K. S. Farrar*, and S. L. Murchie, Comparison of methods to determine furrow system centers on Ganymede and Callisto, LPSC XXXV, #1809, 2004.

Collins, G. C., and Goodman, J. C., Hydrothermal plumes and heating Europa’s ice shell from below, Workshop on Europa’s Icy Shell: Past, Present, and Future, #7032, 2004.

Crawford, Z. A., R. T. Pappalardo, and G. C. Collins, Creating a georeferenced digital image library of Europa, Workshop on Europa’s Icy Shell: Past, Present, and Future, #7035, 2004.

Collins, G. C., J. W. Head, G. W. Patterson, R. T. Pappalardo, and L. M. Prockter, Global mapping of bright terrain on Ganymede: A post-Galileo view of units and structures, PGG Planetary Mappers Meeting, 2003.

Patterson, G. W., J. W. Head, G. C. Collins, R. T. Pappalardo, and L. M. Prockter, Global mapping of Ganymede at 1:15M scale: Defining dark terrain, PGG Planetary Mappers Meeting, 2003.

Collins, G. C., Toward a global understanding of Ganymede tectonics, Forum on Concepts and Approaches for Jupiter Icy Moons Orbiter, #9045, 2003.

Head, J. W., G. W. Patterson, G. C. Collins, R. T. Pappalardo, and L. M. Prockter, Global geologic mapping of Ganymede: Outstanding questions and candidate contributions from JIMO, Forum on Concepts and Approaches for Jupiter Icy Moons Orbiter, #9039, 2003.

Collins, G. C., J. C. Goodman, and R. T. Pierrehumbert, Can hydrothermal plumes melt through Europa’s ice shell?, LPSC XXXIV, #1430, 2003.

Goodman, J. C., G. C. Collins, J. Marshall, and R. T. Pierrehumbert, Dynamics of hydrothermal plumes on Europa: Implications for chaos formation, LPSC XXXIV, #1834, 2003.

McBee, J. H.*, D. Hartmann*, and G. C. Collins, Strain across ridges on Europa, LPSC XXXIV, #1783, 2003.

Pappalardo, R. T., G. C. Collins, J. W. Head, J. M. Moore, and P. M. Schenk, Grooved terrain on Ganymede: A Galileo-based synthesis, LPSC XXXIV, #1509, 2003.

Head, J. W., G. C. Collins, and R. T. Pappalardo, Global mapping of Ganymede: Galileo-related views of structures, structural relationships, and structural units, PGG Planetary Mappers Meeting, 2002.

Collins, G. C., The youngest grooves on Ganymede, LPSC XXXIII, #1783, 2002.

Farrar, K. S.*, and G. C. Collins, Global mapping of Ganymede impact features, LPSC XXXIII, #1450, 2002.

McBee, J. H.*, and G. C. Collins, Stratigraphic breakdown of grooves in western Sippar Sulcus and leading hemisphere of Ganymede, LPSC XXXIII, #1449, 2002.

Prockter, L. M., G. C. Collins, S. L. Murchie, P. M. Schenk, and R. T. Pappalardo, Ganymede furrow systems as strain markers: Implications for evolution and resurfacing processes, LPSC XXXIII, #1272, 2002.

Collins, G. C., J. W. Head, R. T. Pappalardo, B. Nixon, B. Giese, and R. Wagner, The formation of Arbela Sulcus and other smooth linear features on Ganymede: Possible crustal spreading and shear, LPSC XXXII, #1498, 2001.

Collins, G. C., and K. S. Farrar*, A GIS crater database for comparison of crater density on Ganymede terrain types and features, LPSC XXXII, #1499, 2001.

Head, J. W., R. T. Pappalardo, G. Collins, N. Spaun, B. Nixon, R. Wagner, B. Giese, G. Neukum, and the Galileo SSI Team, Ganymede: Very high resolution data from G28 reveal new perspectives on processes and history, LPSC XXXII, #1980, 2001.

Head, J. W., R. Pappalardo, G. Collins, N. Spaun, B. Nixon, R. Wagner, B. Giese, G. Neukum and the Galileo SSI Team, Ganymede: G28 very high resolution data reveal new perspectives on geological processes and history, Eos Trans. AGU 81, F790, 2000.

Pappalardo, R. T., J. W. Head, B. E. Nixon, G. C. Collins, R. Wagner, B. Giese, G. Neukum, and the Galileo Imaging Team, Morphology and Structure of Ganymede Grooved Terrain at Very High Resolution: Results from Galileo G28 Imaging, Eos Trans. AGU 81, F791, 2000.

Spaun, N. A., J. W. Head, R. T. Pappalardo, G. C. Collins, and the Galileo SSI Team, Caldera-like features on Ganymede from Galileo (G28) very high resolution imaging, Eos Trans. AGU 81, F791, 2000.

Pappalardo, R. T., G. C. Collins, L. M. Prockter, and J. W. Head, Comparative tectonics of Europa and Ganymede, Bull. AAS 32, 1067, 2000.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Chaos formation on Europa: Plausibility of the melt-through and solid-state diapir models, LPSC XXXI, #1033, 2000.

Collins, G. C., J. W. Head, R. T. Pappalardo, and the Galileo SSI team, A global database of grooves and dark terrain on Ganymede, enabling quantitative assessment of terrain features, LPSC XXXI, #1034, 2000.

Collins, G. C., and R. T. Pappalardo, Predicted stress patterns on Pluto and Charon due to their mutual orbital evolution, LPSC XXXI, #1035, 2000.

McEwen, A. S., M. J. S. Belton, H. H. Breneman, G. Collins, J. W. Head, T. V. Johnson, L. Keszthelyi, K. P. Klaasen, R. Lopes-Gautier, K. P. Magee, M. Milazzo, J. M. Moore, R. T. Pappalardo, C. B. Phillips, J. Radebaugh, P. Schuster, D. P. Simonelli, E. P. Turtle, and D. A. Williams, High-resolution images of Io from Galileo SSI, LPSC XXXI, #1995, 2000.

Pappalardo, R. T., J. G. Patel, G. C. Collins, L. M. Prockter, and J. W. Head, Morphology and evolution of ridge and trough terrain on Ganymede, LPSC XXXI, #1989, 2000.

Pappalardo, R. T., G. C. Collins, L. M. Prockter, and J. G. Patel, Morphological types of ridge and trough terrain on Ganymede and a possible genetic sequence, Bull. AAS 31, 1163, 1999.

Collins, G. C., J. W. Head, R. T. Pappalardo, and N. A. Spaun, Evaluating models for the formation of chaotic terrain on Europa, LPSC XXX, #1434, 1999.

Collins, G. C., R. T. Pappalardo, and J. W. Head, Surface stresses resulting from internal differentiation: Application to Ganymede tectonics, LPSC XXX, #1695, 1999.

Head, J. W., R. T. Pappalardo, L. M. Prockter, G. C. Collins, N. A. Spaun, R. Greeley, J. Klemaszewski, R. Sullivan, C. Chapman, and the Galileo SSI Team, Europa: Recent geological history from Galileo observations, LPSC XXX, #1404, 1999.

Head, J. W., R. T. Pappalardo, N. A. Spaun, L. M. Prockter and G. C. Collins, Chaos terrain on Europa: Characterization from Galileo E12 very high resolution images of Conamara Chaos: 1: Polygons, LPSC XXX, #1285, 1999.

Head, J. W., R. T. Pappalardo, N. A. Spaun, L. M. Prockter and G. C. Collins, Chaos terrain on Europa: Characterization from Galileo E12 very high resolution images of Conamara Chaos: 2: Matrix, LPSC XXX, #1587, 1999.

Head, J. W., R. T. Pappalardo, T. Denk, N. Spaun, L. Prockter, and G. Collins, Conamara Chaos region: Analysis of color variations and relationship to geologic processes, LPSC XXX, #1440, 1999.

Kadel S., F.  Chuang, R. Greeley, J. Granahan,  F. Fanale, E. Asphaug, J. Moore, G. Collins, J. Head, R. Pappalardo, L. Prockter, R. Carlson,  and the Galileo SSI and NIMS Teams, Geomorphic mapping of Europa: Clues to an underlying water ocean from the Tyre Macula region, LPSC XXX, #1975, 1999.

Moore, J. M., E. Asphaug, D. Morrison, R. J. Sullivan, B. Bierhaus, C. R. Chapman, R. Greeley, J. E. Klemaszewski, S. Kadel, F. Chuang, J. Moreau, K. K. Williams, E. P. Turtle, C. B. Phillips, P. E. Geissler, A. S. McEwen, J. W. Head, R. T. Pappalardo, G. C. Collins, B. Giese, R. Wagner, G. Neukum, K.P. Klaasen, H. H. Breneman, K. P. McGee, D. A. Senske, J. Granahan, M. J. S. Belton, P. M. Schenk, and the Galileo SSI Team, Impact features on Europa: Results of the Galileo Europa Mission (GEM). LPSC XXX, #1485, 1999.

Pappalardo, R. T. and G. C. Collins, Extensionally strained craters on Ganymede, LPSC XXX, #1773, 1999.

Prockter L. M., J. W. Head, R. T. Pappalardo, G. C. Collins, J. E. Klemaszewski, P. E. Geissler, and the Galileo SSI Team, Geologic mapping of central Agenor Linea, Europa (212??q - 226??q), LPSC XXX, #1299, 1999.

Spaun, N. A., L. M. Prockter, R. T. Pappalardo, J. W. Head, G. C. Collins, A. Antman, R. Greeley, and the Galileo SSI Team, Spatial distribution of chaos and lenticulae on Europa, LPSC XXX, #1847, 1999.

Turtle, E. P., C. B. Phillips, G. C. Collins, A. S. McEwen, J. M. Moore, R. T. Pappalardo, P. M. Schenk, and the Galileo SSI Team, Europan impact crater diameters and inferred transient crater dimensions and excavation depths, LPSC XXX, #1882, 1999.

Pappalardo, R. T., J. W. Head, G. C. Collins, L. M. Prockter, J. G. Patel, T. Denk, K. Khurana, and the Galileo SSI Team, Ganymede after Galileo: Dark, grooved, and polar terrains, Annales Geophysicae 1, 741, 1999.

Collins, G. C., J. W. Head, R. T. Pappalardo, N. A. Spaun, and the Galileo SSI Team, Models for the formation of chaotic terrain on Europa, Eos Trans. AGU 79 (45), F540, 1998.

Geissler, P., R. Greenberg, G. Hoppa, A. McEwen, R. Tufts, C. Phillips, M. Milazzo, B. Clark, M. Ockert-Bell, P. Helfenstein, J. Burns, J. Veverka, R. Sullivan, J. Klemaszewski, R. Greeley, R. T. Pappalardo, G. Collins, L. Prockter, J. W. Head III, J. Moore, M. J. S. Belton, T. Denk, and the Galileo Imaging Team, An active lineament on Europa?, Eos Trans. AGU 79 (45), F539, 1998.

Spaun, N. A., J. W. Head III, L. M. Prockter, G. C. Collins, R. T. Pappalardo, and the Galileo Imaging Team, Chaos and micro-chaos: Mapping, unit descriptions, and origins, Eos Trans. AGU 79 (45), F540, 1998.

Bierhaus, B., C. R. Chapman, W. J. Merline, S. Brooks, E. Asphaug, M. J. Belton, R. T. Pappalardo, J. W. Head, L. M. Prockter, G. C. Collins, and the Galileo Imaging Team, Secondary cratering on Europa: A chronology of the Pwyll impact event and the Conamara region, Eos Trans. AGU 79 (17), S198, 1998.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Smooth linear deposits in Ganymede grooved terrain: Considerations on the role of cryovolcanism versus tectonism, Eos Trans. AGU 79 (17), S202-203, 1998.

Head, J. W., R. Pappalardo, J. Kay, L. M. Prockter, G. Collins, N. Sherman, R. Greeley, and the Galileo Imaging Team, Galileo evidence for cryovolcanism on Ganymede and Europa, Eos Trans. AGU 79 (17), S202, 1998.

Pappalardo, R. T., J. Spencer, P. E. Geissler, L. M. Prockter, G. C. Collins, J. W. Head, P. Helfenstein, and the Galileo Imaging Team, What controls the albedo patterns on Europa?, Eos Trans. AGU 79 (17), S198, 1998.

Prockter, L. M., R. T. Pappalardo, R. Sullivan, G. C. Collins, J. W. Head, G. Neukum, T. Roatsch, B. Giese, R. Wagner, and the Galileo Imaging Team, Creation of new crust at Europan wedges: Is a terrestrial seafloor spreading model an appropriate analog?, Eos Trans. AGU 79 (17), S203, 1998.

Collins, G. C., R. T. Pappalardo, J. W. Head, and the Galileo SSI team, Tectonics of Ganymedeís grooved terrain: Insights from Galileo imaging, Nantes 98 International Symposium: The Jovian system after Galileo - the Saturnian system before Cassini-Huygens, 46, 1998.

Head, J. W., R. T. Pappalardo, G. Collins, L. Prockter, J. Kay, N. D. Sherman, R. Greeley, and the Galileo SSI team, Cryovolcanism on Europa and Ganymede: Evidence from Galileo data and interpreted eruption conditions, Nantes 98 International Symposium: The Jovian system after Galileo - the Saturnian system before Cassini-Huygens, 57, 1998.

Head, J. W., R. T. Pappalardo, L. M. Prockter, G. Collins, M. J. S. Belton, M. Carr, C. Chapman, R. Greeley, R. Greenberg, A. McEwen, G. Neukum, C. Pilcher, J. Veverka, T. Johnson, K. Klaasen, D. Senske, K. Magee, H. Breneman, J. Kaufman, T. Jones, P. Helfenstein, J. Oberst, B. Giese, T. Denk, D. Morrison, J. Moore, and the Galileo SSI team, Ganymede: An overview of Galileo Solid State Imaging (SSI) results, Nantes 98 International Symposium: The Jovian system after Galileo - the Saturnian system before Cassini-Huygens, 58, 1998.

Pappalardo, R. T., J. W. Head, G. C. Collins, L. M. Prockter, R. Greeley, J. Klemaszewski, R. J. Sullivan, M. H. Carr, C. R. Chapman, R. Greenberg, P. Geissler, B. R. Tufts, C. B. Phillips, A. S. McEwen, J. M. Moore, M. J. S. Belton, and the Galileo Imaging Team, The geology of Europa as revealed by Galileo imaging, Nantes 98 International Symposium: The Jovian system after Galileo - the Saturnian system before Cassini-Huygens, 3, 1998.

Head, J. W., R. Pappalardo, J. Kay, G. Collins, L. Prockter, and the Galileo Imaging team, Galileo evidence for Ganymede cryovolcanism, Annales Geophysicae 16, C991, 1998.

Head, J. W., R. Pappalardo, L. Prockter, G. Collins, G. Neukum, M. J. S. Belton, and the Galileo Imaging team, Synthesis of Galileo imaging results for Ganymede, Annales Geophysicae 16, C991, 1998.

Collins, G. C., J. W. Head, R. T. Pappalardo, and the Galileo SSI team, Analysis of regional stratigraphic relationships in Ganymede grooved terrain: Galileo results, LPSC XXIX, #1319, 1998.

Collins, G. C., J. W. Head, R. T. Pappalardo, and the Galileo SSI team, Two scales of deformation in Byblus Sulcus and Nippur Sulcus: Additional evidence for necking in Ganymede grooved terrain, LPSC XXIX, #1321, 1998.

Collins, G. C., J. W. Head, R. T. Pappalardo, and the Galileo SSI team, Geology of the Galileo G7 Nun Sulci target area, Ganymede, LPSC XXIX, #1755, 1998.

Gilmore, M. S., G. C. Collins, J. W. Head, M. A. Ivanov, and L. Marinangeli, Tessera tectonics, LPSC XXIX, #1943, 1998.

Head, J. W., R. T. Pappalardo, L. M. Prockter, G. Collins, M. J. S. Belton, M. Carr, C. Chapman, R. Greeley, R. Greenberg, A. McEwen, G. Neukum, C. Pilcher, J. Veverka, T. Johnson, K. Klaasen, D. Senske, K. Magee, H. Breneman, J. Kaufman, T. Jones, P. Helfenstein, J. Oberst, B. Giese, T. Denk, D. Morrison, J. Moore, and the Galileo Imaging Team, Ganymede: Overview of Solid State Imaging (SSI) findings from the nominal Galileo mission, LPSC XXIX, #1774, 1998.

Head, J. W., R. T. Pappalardo, J. Kay, G. Collins, L. Prockter, R. Greeley, C. Chapman, M. Carr, M. J. S. Belton, and the Galileo Imaging Team, Cryovolcanism on Ganymede: Evidence in bright terrain from Galileo Solid State Imaging data, LPSC XXIX, #1666, 1998.

Pappalardo, R. T., N. D. Sherman, J. W. Head, G. C. Collins, R. Greeley, J. Klemaszewski, R. Sullivan, C. B. Phillips, A. S. McEwen, P. E. Geissler, and the Galileo Imaging Team, Distribution of mottled terrain on Europa: A possible link to nonsynchronous rotation stresses, LPSC XXIX, #1923, 1998.

Patel, J. G., R. T. Pappalardo, J. W. Head, G. C. Collins, and the Galileo Imaging Team, Wavelengths of Ganymede grooved terrain determined from Fourier analysis of Galileo images, LPSC XXIX, #1805, 1998.

Prockter, L. M., R. T. Pappalardo, G. C. Collins, J. W. Head, R. Greeley, M. H. Carr, M. J. S. Belton, D. A. Senske, and the Galileo Imaging Team, Galileo very high resolution imaging of Conamara Chaos, Europa, LPSC XXIX, #1964, 1998.

Prockter, L. M., R. T. Pappalardo, J. W. Head, E. Asphaug, G. C. Collins, and the Galileo SSI Team, Genesis of Anshar Sulcus: Evidence for shear and extension in Marius Regio, LPSC XXIX, #1674, 1998.

Prockter, L. M., D. Senske, J. W. Head, R. T. Pappalardo, G. C. Collins, R. Greeley, and the Galileo SSI Team, Furrow systems on Ganymede: Morphology, evolution, and distribution, LPSC XXIX, #1862, 1998.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Mechanisms for the formation of Ganymede grooved terrain: Results from Galileo imaging and global stratigraphic mapping, Eos Trans. AGU 78 (46), F417, 1997.

Head, J. W., R. Pappalardo, R. Greeley, R. Greenberg, C. Chapman, G. Neukum, M. J. Belton, M. Carr, C. Pilcher, G. Collins, L. Prockter, K. Jones, J. Moore, D. Senske, K. Klaasen, K. Magee, and H. Breneman, Ganymede: Synthesis of Solid State Imaging results from the Galileo mission, Eos Trans. AGU 78 (46), F408, 1997.

Head, J. W., R. Pappalardo, J. Kay, G. Collins, L. Prockter, R. Greeley, C. Chapman, M. Carr, and M. J. Belton, Cryovolcanism on Ganymede: Evidence from Galileo Solid State Imaging data, Eos Trans. AGU 78 (46), F417, 1997.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Ganymede grooved terrain: A key to comparing the geological histories of Ganymede and Callisto, GSA Ann. Mtg. Abstracts, 313, 1997.

Pappalardo, R. T., J. W. Head, G. C. Collins, R. Greeley, R. J. Sullivan, B. R. Tufts, and J. M. Moore, Ridges, troughs, and lithospheric thickness on Ganymede and Europa, GSA Ann. Mtg. Abstracts, 313, 1997.

Collins, G. C., J. W. Head, A. T. Basilevsky, and M. A. Ivanov, Rapid emplacement the regional plains on Venus: Evidence from the embayed crater population, AGU Chapman Conference: Geodynamics of Venus: Evolution and current state, 8, 1997.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Formation of Ganymede grooved terrain: Results from Galileo imaging, Bull. AAS 29 (3), 989, 1997.

Pappalardo, R. T., J. W. Head, G. C. Collins, L. M. Prockter, R. Greeley, C. R. Chapman, P. Helfenstein, G. Neukum, R. Wagner, and B. R. Tufts, Ganymede tectonics: Insights from Galileo imaging, Bull. AAS 29 (3), 989, 1997.

Collins, G. C., R. T. Pappalardo, and J. W. Head, Structural model of Ganymede grooved terrain based on Galileo high-resolution stereo imaging, Eos Trans. AGU 78 (17), S204, 1997.

Pappalardo, R. T., J. W. Head, L. M. Prockter, G. C. Collins, K. B. Jones, R. Greeley, C. R. Chapman, G. Neukum, T. Denk, B. Giese, U. Koehler, J. Oberst, R. Wagner, P. Helfenstein, J. M. Moore, B. R. Tufts, and M. J. S. Belton, Geology of Ganymede as revealed by Galileo imaging, Eos Trans. AGU 78 (17), S204, 1997.

Collins, G. C., J. W. Head, M. A. Ivanov, and A. T. Basilevsky, Timescale of regional plains emplacement on Venus, LPSC XXVIII, 243-244, 1997.

Collins, G. C., J. W. Head, R. T. Pappalardo, and the Galileo Imaging Team, Formation of Ganymede grooved terrain by sequential extensional episodes: Implications of Galileo observations for regional tectonics, LPSC XXVIII, 245-246, 1997.

Collins, G. C., J. W. Head, R. T. Pappalardo, and the Galileo Imaging Team, A necking origin for Ganymede long wavelength grooved terrain topography: Insights from Galileo observations at Uruk Sulcus, LPSC XXVIII, 247-248, 1997.

Head, J. W., R. Pappalardo, G. Collins, R. Greeley, and the Galileo Imaging Team, Tectonic resurfacing on Ganymede and its role in the formation of grooved terrain, LPSC XXVIII, 535-536, 1997.

Head, J. W., R. T. Pappalardo, G. Collins, L. Prockter, and the Galileo Imaging Team, Nippur Sulcus region, Ganymede: Nature of high-latitude groove lanes and their relation to Marius Regio from Galileo SSI data, LPSC XXVIII, 537-538, 1997.

Head, J. W., R. T. Pappalardo, G. Collins, L. Prockter, C. Weitz, and the Galileo Imaging Team, Marius Regio groove lane, Ganymede: Nature of dark terrain and relationship to groove terrain formation, LPSC XXVIII, 539-540, 1997.

Pappalardo, R. T., J. W. Head, G. C. Collins, R. Greeley, and the Galileo SSI Team, Ganymede grooved terrain at the local scale: Results from Galileo, LPSC XXVIII, 1061-1062, 1997.

Pappalardo, R. T., J. W. Head, G. C. Collins, R. Greeley, and the Galileo SSI Team, The origin of grooved terrain on Ganymede: Insights from Galileo high-resolution imaging, LPSC XXVIII, 1063-1064, 1997.

Pappalardo, R. T., J. W. Head, G. C. Collins, C. Pilcher, P. Helfenstein, J. Veverka, J. Burns, T. Denk, G. Neukum, M. Belton, and the Galileo Imaging Team, Ganymede northern high latitude frosts: Preliminary observations from Galileo SSI data, LPSC XXVIII, 1065-1066, 1997.

Pappalardo, R. T., J. W. Head, B. R. Tufts, G. C. Collins, L. M. Prockter, and the Galileo SSI Team, Galileo images of a region of transitional terrain on Ganymede: Preliminary analysis, LPSC XXVIII, 1069-1070, 1997.

Rosenblatt, P., J. W. Head, P. C. Pinet, M. A. Ivanov, and G. Collins, Topographic and stratigraphic analysis of two venusian volcanic rises: Western Eistla and Bell Regiones, LPSC XXVIII, 1197-1198, 1997.

Senske, D. A., J. W. Head, R. Pappalardo, G. Collins, R. Greeley, K. Magee, G. Neukum, C. Chapman, and the Galileo Imaging Team, Stratigraphy of Uruk Sulcus as revealed by high-resolution Galileo images, LPSC XXVIII, 1277-1278, 1997.

Sun, J., J. G. Patel, R. T. Pappalardo, J. W. Head, G. C. Collins, G. Neukum, B. Giese, J. Oberst, A. C. Cook, B. Schreiner, and the Galileo SSI Team, Fourier analysis of grooved terrain on Ganymede from Galileo high resolution images, LPSC XXVIII, 1397-1398, 1997.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Galileo at Ganymede: Linking stratigraphic observations of Uruk Sulcus to Voyager data, Eos Trans. AGU 77, p. F437-F438, 1996.

Collins, G. C., J. W. Head, and R. T. Pappalardo, Galileo observations of bright terrain on Ganymede: Extrapolation of structural and stratigraphic observations to surrounding areas, GSA Ann. Mtg. Abstracts, 70, 1996.

Head, J. W., R. T. Pappalardo, G. C. Collins, and G. Neukum, Tectonic resurfacing on Ganymede: A Galileo view, GSA Ann. Mtg. Abstracts, 70, 1996.

Magee, K., J. W. Head, R. T. Pappalardo, G. C. Collins, and R. Greeley, Bright terrain on Ganymede: Galileo sheds new light on stratigraphic relationships, GSA Ann. Mtg. Abstracts, 71, 1996.

Pappalardo, R. T., J. W. Head, and G. C. Collins, Stress and strain in Ganymede's grooved terrain: Structural analysis as revealed by Galileo imaging, GSA Ann. Mtg. Abstracts, 70, 1996.

Senske, D., J. W. Head, R. T. Pappalardo, and G. C. Collins, Processes of emplacement and evolution of dark terrain on Ganymede: Early Galileo results, GSA Ann. Mtg. Abstracts, 71, 1996.

Pappalardo, R., J. Head, C. Chapman, R. Greeley, P. Helfenstein, R. Kirk, G. Neukum, G. Collins, K. Magee, and the Galileo Imaging Team, Bright terrain on Ganymede: Preliminary results from Galileo imaging of Uruk Sulcus, Bull. AAS 28, 1139, 1996.

Pappalardo, R., J. Head, G. Collins, G. Neukum, R. Greeley, J. Moore, C. Chapman, D. Senske, K. Magee, P. Helfenstein, R. Kirk, B. R. Tufts, and the Galileo Imaging Team, Tectonic resurfacing and processes of deformation of the grooved terrain on Ganymede: Initial Galileo results, Bull. AAS 28, 1139, 1996.

Collins, G. C. and J. W. Head, Criteria for determination of volcanic embayment of impact craters on Venus, LPSC XXVII, p. 243-244, 1996.

Collins, G. C., A. T. Basilevsky, J. W. Head, and M. A. Ivanov, Impact crater embayment on Venus and the termination of global resurfacing, LPSC XXVII, p. 245-246, 1996.

Gilmore, M. S., J. W. Head, J. A. Cutts, K. T. Nock, G. Collins, L. S. Crumpler, A. V. deCharon, M. Parry, and R. A. Yingst, Investigation of the application of aerobot technology at Venus, LPSC XXVII, p. 417-418, 1996.

Head, J. W., S. Murchie, and G. Collins, A pre-Galileo review of major geologic questions about Ganymede, LPSC XXVI, p. 569-570, 1995.

Collins, G. and P. Schenk, Triton’s lineaments: Complex morphology and stress patterns, LPSC XXV, p. 277-278, 1994.