Geology of the Gusev cratered plains from the Spirit rover transverse

Matt P. Golombek, L. S. Crumpler, John A. Grant, R. Greeley, N. A. Cabrol, T. J. Parker, Jr W. Rice, J. G. Ward, Raymond E. Arvidson, J. E. Moersch, R. L. Fergason, Philip Christensen, A. Castaño, R. Castaño, A. F C Haldemann, Rongxing Li, James Bell, S. W. Squyres

Research output: Contribution to journalArticle

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Abstract

The cratered plains of Gusev traversed by Spirit are generally low-relief rocky plains dominated by impact and eolian processes. Ubiquitous shallow, soil-filled, circular depressions, called hollows, are modified impact craters. Rocks are dark, fine-grained basalts, and the upper 10 m of the cratered plains appears to be an impact-generated regolith developed over intact basalt flows. Systematic field observations across the cratered plains identified vesicular clasts and rare scoria similar to original lava flow tops, consistent with an upper inflated surface of lava flows with adjacent collapse depressions. Crater and hollow morphometry are consistent with most being secondaries. The size-frequency distribution of rocks >0.1 m diameter generally follows exponential functions similar to other landing sites for total rock abundances of 5-35%. Systematic clast counts show that areas with higher rock abundance and more large rocks have higher thermal inertia. Plains with lower thermal inertia have fewer rocks and substantially more pebbles that are well sorted and evenly spaced, similar to a desert pavement or lag. Eolian bed forms (ripples and wind tails) have coarse surface lags, and many are dust covered and thus likely inactive. Deflation of the surface ∼5-25 cm likely exposed two-toned rocks and elevated ventifacts and transported fines into craters creating the hollows. This observed redistribution yields extremely slow average erosion rates of ∼0.03 nm/yr and argues for very little long-term net change of the surface and a dry and desiccating environment similar to today's since the Hesperian (or ∼3 Ga).

Original languageEnglish (US)
Article numberE02S07
JournalJournal of Geophysical Research E: Planets
Volume111
Issue number2
DOIs
StatePublished - Feb 20 2006

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Geology
geology
plains
Rocks
rocks
rock
craters
crater
hollow
lava
lava flow
inertia
basalt
clast
time lag
fines
landing sites
pavements
eolian process
deflation

ASJC Scopus subject areas

  • Oceanography
  • Astronomy and Astrophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Geophysics
  • Geochemistry and Petrology

Cite this

Golombek, M. P., Crumpler, L. S., Grant, J. A., Greeley, R., Cabrol, N. A., Parker, T. J., ... Squyres, S. W. (2006). Geology of the Gusev cratered plains from the Spirit rover transverse. Journal of Geophysical Research E: Planets, 111(2), [E02S07]. https://doi.org/10.1029/2005JE002503

Geology of the Gusev cratered plains from the Spirit rover transverse. / Golombek, Matt P.; Crumpler, L. S.; Grant, John A.; Greeley, R.; Cabrol, N. A.; Parker, T. J.; Rice, Jr W.; Ward, J. G.; Arvidson, Raymond E.; Moersch, J. E.; Fergason, R. L.; Christensen, Philip; Castaño, A.; Castaño, R.; Haldemann, A. F C; Li, Rongxing; Bell, James; Squyres, S. W.

In: Journal of Geophysical Research E: Planets, Vol. 111, No. 2, E02S07, 20.02.2006.

Research output: Contribution to journalArticle

Golombek, MP, Crumpler, LS, Grant, JA, Greeley, R, Cabrol, NA, Parker, TJ, Rice, JW, Ward, JG, Arvidson, RE, Moersch, JE, Fergason, RL, Christensen, P, Castaño, A, Castaño, R, Haldemann, AFC, Li, R, Bell, J & Squyres, SW 2006, 'Geology of the Gusev cratered plains from the Spirit rover transverse', Journal of Geophysical Research E: Planets, vol. 111, no. 2, E02S07. https://doi.org/10.1029/2005JE002503
Golombek MP, Crumpler LS, Grant JA, Greeley R, Cabrol NA, Parker TJ et al. Geology of the Gusev cratered plains from the Spirit rover transverse. Journal of Geophysical Research E: Planets. 2006 Feb 20;111(2). E02S07. https://doi.org/10.1029/2005JE002503
Golombek, Matt P. ; Crumpler, L. S. ; Grant, John A. ; Greeley, R. ; Cabrol, N. A. ; Parker, T. J. ; Rice, Jr W. ; Ward, J. G. ; Arvidson, Raymond E. ; Moersch, J. E. ; Fergason, R. L. ; Christensen, Philip ; Castaño, A. ; Castaño, R. ; Haldemann, A. F C ; Li, Rongxing ; Bell, James ; Squyres, S. W. / Geology of the Gusev cratered plains from the Spirit rover transverse. In: Journal of Geophysical Research E: Planets. 2006 ; Vol. 111, No. 2.
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