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Titolo:
Geological processes and evolution
Autore:
Head, JW; Greeley, R; Golombek, MP; Hartmann, WK; Hauber, E; Jaumann, R; Masson, P; Neukum, G; Nyquist, LE; Carr, MH;
Indirizzi:
Brown Univ, Dept Geol Sci, Providence, RI 02912 USA Brown Univ ProvidenceRI USA 02912 ept Geol Sci, Providence, RI 02912 USA Arizona State Univ, Dept Geol, Tempe, AZ 85287 USA Arizona State Univ Tempe AZ USA 85287 niv, Dept Geol, Tempe, AZ 85287 USA CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA CALTECH Pasadena CA USA 91109 LTECH, Jet Prop Lab, Pasadena, CA 91109 USA Planetary Sci Inst, Tucson, AZ 85705 USA Planetary Sci Inst Tucson AZ USA85705 ary Sci Inst, Tucson, AZ 85705 USA DLR Inst Space Sensor Technol & Planetary Explora, D-12484 Berlin, GermanyDLR Inst Space Sensor Technol & Planetary Explora Berlin Germany D-12484 Univ Paris Sud, F-91405 Orsay, France Univ Paris Sud Orsay France F-91405 niv Paris Sud, F-91405 Orsay, France NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA NASA Houston TX USA 77058 ndon B Johnson Space Ctr, Houston, TX 77058 USA US Geol Survey, Branch Astrogeol Studies, Menlo Pk, CA 94025 USA US Geol Survey Menlo Pk CA USA 94025 geol Studies, Menlo Pk, CA 94025 USA
Titolo Testata:
SPACE SCIENCE REVIEWS
fascicolo: 1-4, volume: 96, anno: 2001,
pagine: 263 - 292
SICI:
0038-6308(200104)96:1-4<263:GPAE>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORBITER LASER ALTIMETER; MARS GLOBAL SURVEYOR; PLANETARY WRINKLE RIDGES; THARSIS REGION; MARTIAN CHANNELS; VALLES-MARINERIS; MOLA DATA; TERRESTRIAL ANALOGS; OUTFLOW CHANNELS; TECTONIC HISTORY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
155
Recensione:
Indirizzi per estratti:
Indirizzo: Head, JW Brown Univ, Dept Geol Sci, Providence, RI 02912 USA Brown Univ Providence RI USA 02912 Sci, Providence, RI 02912 USA
Citazione:
J.W. Head et al., "Geological processes and evolution", SPACE SCI R, 96(1-4), 2001, pp. 263-292

Abstract

Geological mapping and establishment of stratigraphic relationships provides an overview of geological processes operating on Mars and how they have varied in time and space. Impact craters and basins shaped the crust in earliest history and as their importance declined, evidence of extensive regional volcanism emerged during the Late Noachian. Regional volcanism characterized the Early Hesperian and subsequent to that time, volcanism was largely centered at Tharsis and Elysium, continuing until the recent geological past. The Tharsis region appears to have been largely constructed by the Late Noachian, and represents a series of tectonic and volcanic centers. Globally distributed structural features representing contraction characterize the middle Hesperian. Water-related processes involve the formation of valley networks in the Late Noachian and into the Hesperian, an ice sheet at thesouth pole in the middle Hesperian, and outflow channels and possible standing bodies of water in the northern lowlands in the Late Hesperian and into the Amazonian. A significant part of the present water budget occurs in the present geologically young polar layered terrains. In order to establishmore firmly rates of processes, we stress the need to improve the calibration of the absolute timescale, which today is based on crater count systemswith substantial uncertainties, along with a sampling of rocks of unknown provenance. Sample return from carefully chosen stratigraphic units could calibrate the existing timescale and vastly improve our knowledge of Martianevolution.

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Documento generato il 29/11/20 alle ore 15:06:24