Loading...
Please wait, while we are loading the content...
Similar Documents
Trace fossils of microbial colonization on mars: criteria for search and for sample return
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Friedmann, E. I. |
| Copyright Year | 1988 |
| Description | The recent discovery of microbial trace-fossil formation in the frigid Ross Desert of Antarctica suggests that early primitive life on Mars may have left behind similar signatures. These trace fossils are apparent as chemical or physical changes in rock (or sediment) structure (or chemistry) caused by the activity of organisms. Life on Mars, if it ever existed, almost certainly did not evolve above the level of microorganisms, and this should be considered in search for fossil life. For the reasons detailed here, microbial trace fossils seem to be a better and more realistic target for search than would be true microbial fossils (remnants of cellular structures). |
| File Size | 98624 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890008945 |
| Archival Resource Key | ark:/13960/t38100c68 |
| Language | English |
| Publisher Date | 1988-01-01 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Exploration Microorganisms Extraterrestrial Life Ecosystems Mars Sample Return Missions Bacteria Chemical Reactions Antarctic Regions Mars Surface Samples Fossils Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
