Accession Number : ADA266601


Title :   Geology and Geophysics Program Summary for FY 90


Corporate Author : LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266601.pdf


Report Date : Mar 1991


Pagination or Media Count : 4


Abstract : The high-latitude northern Norwegian-Greenland Sea and the adjacent part of the Arctic Ocean north of Spitsbergen comprise an unequaled natural laboratory for the study of several important processes involving the generation and/or modification of sea-floor topography, subbottom structure, and material properties. These processes, active now or in the geologically recent past, include (1) tectonism (faulting), volcanism, magma intrusion into rift valley seafloor sediments;(2) erosion and redeposition of sediment by bottom currents; (3) slumping and other downslope processes on glaciated margins; (4) sedimentation from sea ice/icebergs/ice sheets, at water depths less than 100- 500 m, (5) erosion and redeposition by icebergs and grounded ice shelves/sheets. SeaMarc II is the ideal tool for investigating the results of these processes, e.g. the present bathymetric and back-scatter characteristics of the seafloor. The investigation area is probably unique in terms of diversity of processes which can be examined in a relatively small region


Descriptors :   *OCEAN BOTTOM TOPOGRAPHY , OCEAN CURRENTS , GEOLOGY , SONAR , TECTONICS , MAGMA , VOLCANISM , SEDIMENTATION , ACOUSTIC DATA , EROSION


Subject Categories : Physical and Dynamic Oceanography


Distribution Statement : APPROVED FOR PUBLIC RELEASE