Geology and insolation-driven climatic history of Amazonian north polar materials on Mars

Details Geology and insolation-driven climatic history of Amazonian north polar materials on Mars Geology and insolation-driven climatic history of Amazonian north polar materials on Mars

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005natur.437..991t&link_type=abstract

Nature, Volume 437, Issue 7061, pp. 991-994 (2005).

Mathematics

Logic

38

Scientific paper

Mariner 9 and Viking spacecraft images revealed that the polar regions of Mars, like those of Earth, record the planet's climate history. However, fundamental uncertainties regarding the materials, features, ages and processes constituting the geologic record remained. Recently acquired Mars Orbiter Laser Altimeter data and Mars Orbiter Camera high-resolution images from the Mars Global Surveyor spacecraft and moderately high-resolution Thermal Emission Imaging System visible images from the Mars Odyssey spacecraft permit more comprehensive geologic and climatic analyses. Here I map and show the history of geologic materials and features in the north polar region that span the Amazonian period (~3.0Gyr ago to present). Erosion and redeposition of putative circumpolar mud volcano deposits (formed by eruption of liquefied, fine-grained material) led to the formation of an Early Amazonian polar plateau consisting of dark layered materials. Crater ejecta superposed on pedestals indicate that a thin mantle was present during most of the Amazonian, suggesting generally higher obliquity and insolation conditions at the poles than at present. Brighter polar layered deposits rest unconformably on the dark layers and formed mainly during lower obliquity over the past 4-5Myr (ref. 20). Finally, the uppermost layers post-date the latest downtrend in obliquity <20,000years ago.

Affiliated with

Also associated with

No associations

Rating

Geology and insolation-driven climatic history of Amazonian north polar materials on Mars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Geology and insolation-driven climatic history of Amazonian north polar materials on Mars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geology and insolation-driven climatic history of Amazonian north polar materials on Mars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1382421