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Noachian and Hesperian modification of the original chryse impact basin topography
Author(s) -
Stockman S. A.,
Frey H.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl01111
Subject(s) - noachian , hesperian , geology , impact crater , volcano , volcanology , fluvial , structural basin , outcrop , geomorphology , subsidence , paleontology , martian , mars exploration program , astrobiology , physics
We propose a new center and ring assignment for the original Chryse impact basin based upon photogeologic mapping of Noachian outcrops and re‐examination of the published geology using orthographic projections. While others have centered the Chryse impact on the topographic low associated with Hesperian volcanic and fluvial deposits, we suggest that the center of the Noachian‐age excavation cavity was located approximately 800 km to the north, and that the basin topography was modified significantly from the Noachian into the Hesperian. Evolution of the topographic low included structural modification by a later impact centered in Acidalia, restricted volcanic deposition and loading, localized subsidence, and restricted deposition from the circum‐Chryse outflow channels.