Mathematics – Logic
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p12d0530m&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P12D-0530
Mathematics
Logic
5475 Tectonics (8149), 5480 Volcanism (8450), 6295 Venus
Scientific paper
The plains region Bereghinya Planitia lies north of central Eistla Regio in the Bereghinya Planitia (V-8) and Sappho Patera (V-20) quadrangles, and is bounded approximately by 15 and 50 degrees north, 0 and 30 degrees east. Most of this area is underlain by plains of presumably volcanic origin ("regional plains") with no apparent sources, but significant plains areas are surfaced by flows derived from coronae, central volcanoes, long lava channels, and clusters of small edifices ("shield fields"). Many areas of Venus have similar appearing, but not necessarily coeval, regional plains. A number of outstanding issues of Venus crustal history involve the ages of structures and other units relative to the regional plains - the regional plains commonly are used as a chronologic marker even though they clearly formed over a finite period of time of unknown length, both in years and relative to the ages of other materials. Older than regional plains in Bereghinya Planitia are scattered inliers of radar bright materials and materials of a ridge belt. Structures affecting regional plains include early extensional lineaments, graben swarms, wrinkle ridges, ridges of a ridge belt, belts of closely spaced wrinkle ridges connecting coronae, and ridges and fractures defining coronae. The wrinkle ridges reflect progressive deformation because they occur on almost all units, but with abundances that are proportional to unit ages. Post regional plains strain patterns evolved from areally extensive east-west extension and north-south contraction to an almost chaotic pattern of much more local orientations. The emplacement of volcanic units is interleaved with the deformation history; flows from coronae are mostly, but not entirely, the same age or younger than regional plains, flows from shield fields are mostly, but not entirely, younger than regional plains and younger than corona structures, and flows from large lava channels are younger than regional plains. All 28 impact craters are younger than regional plains and almost all are younger than wrinkle ridges. These relationships imply a relatively fast structural and volcanic evolution following emplacement of regional plains. The crustal history of Bereghinya Planitia reflects a complex of processes that overlapped in time and space, and thus this history cannot easily be fit into a simple evolutionary scheme.
No associations
LandOfFree
Deformation Sequence, Bereghinya Planitia, Venus 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 Deformation Sequence, Bereghinya Planitia, Venus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deformation Sequence, Bereghinya Planitia, Venus will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1238888