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Global stratigraphyAttention is given to recent major advances in the definition and documentation of Martian stratigraphy and geology. Mariner 9 provided the images for the first global geologic mapping program, resulting in the recognition of the major geologic processes that have operated on the planet, and in the definition of the three major chronostratigraphic divisions: the Noachian, Hesperian, and Amazonian Systems. Viking Orbiter images permitted the recognition of additional geologic units and the formal naming of many formations. Epochs are assigned absolute ages based on the densities of superposed craters and crater-flux models. Recommendations are made with regard to future areas of study, namely, crustal stratigraphy and structure, the highland-lowland boundary, the Tharsis Rise, Valles Marineris, channels and valley networks, and possible Martian oceans, lakes, and ponds.
Document ID
19930043866
Document Type
Conference Proceedings
Authors
Tanaka, Kenneth L. (NASA Ames Research Center Moffett Field, CA, United States)
Scott, David H. (USGS Flagstaff, AZ, United States)
Greeley, Ronald (Arizona State Univ. Tempe, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Mars (A93-27852 09-91)
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NCC2-346
CONTRACT_GRANT: NAGW-2064
Distribution Limits
Public
Copyright
Other