Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994icar..110..165g&link_type=abstract
Icarus (ISSN 0019-1035), vol. 110, no. 1, p. 165-177
Physics
13
Analogs, Clays, Dust, Mars Surface, Sediments, Water, Wind Effects, Beds (Geology), Dunes, Mars Photographs, Photointerpretation
Scientific paper
Parna is an Australian aboriginal word meaning 'sandy dust'. It has been applied to deposits of clay, silt, and sand which were initially transported by the wind as aggregates, or pellets, of sand size. Parna is distinguished by its silt and clay content, which in some cases exceeds 85% of the total volume of the deposit. Much of the fine-grained playa silt and clay is incorporated into the parna as sand-sized aggregates, which greatly facilitate their transportation and reworking by the wind. Rain following aggregate emplacement can cause their disintegration, rendering the parna immobile by the wind, yet some pellets can survive several wetting/drying episodes. Parna deposits on Earth occur both as dune forms and as sheet deposits which mantle older terrains. In both cases the deposits are typically derived from lacustrine (lake) beds, such as playas. There is substantial evidence to suggest that bodies of water existed on Mars in the past. Thus, the potential is high for lacustrine deposits and the formation of parna on Mars. Although no parna dunes have been identified, it is suggested that the deposits derived from White Rock (-8 deg, 335 deg W), near Mamers Valles (34 deg, 343 deg W), and elsewhere on Mars may represent sheet parna. Data obtained from Mars-94/96 missions and potential landed spacecraft may provide additional evidence for the existence of parna on Mars.
Greeley Ronald
Williams Steven H.
No associations
LandOfFree
Dust deposits on Mars: The 'parna' analog 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 Dust deposits on Mars: The 'parna' analog, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust deposits on Mars: The 'parna' analog will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-820677