Chamov, N. P. et al. (2001): On the evolution of the Cascadia accretionary prism, western North American continental margin

Leg/Site/Hole:
ODP 146
ODP 146 892
Identifier:
2004-074808
georefid
Creator:
Chamov, N. P.
Russian Academy of Sciences, Geological Institute, Moscow, Russian Federation
author
Basilyan, A. E.
author
Barinov, K. B.
author
Identification:
On the evolution of the Cascadia accretionary prism, western North American continental margin
2001
Geotectonics
MAIK Nauka/Interperiodica Publishing, Birmingham, AL, United States
35
4
306-315
New biostratigraphic data [17] and a find of a Calyptogena pacifica Dall, Mollusca, Bivalvia, shell in the core material from ODP Site 892 are utilized in a model proposed for the development of the Cascadia accretionary prism. The progradation mechanism of the prism is discussed, along with the effect of the vertical displacement of the seafloor surface on the sedimentation environment and the evolution of benthic communities. A scenario is proposed for the evolution of the prism over the time interval from the Late Miocene to present. It is demonstrated that the displacement velocities of distinct elements of the prism vary from 1.5 to 5.5 km/m.y. and increase inland.
English
Serial
Coverage:Geographic coordinates:
North:44.4032
West:-125.0709East: -125.0705
South:44.4026
Solid-earth geophysics; Stratigraphy; accretionary wedges; biostratigraphy; Bivalvia; Cascadia subduction zone; Cenozoic; continental margin; cores; displacements; faults; Invertebrata; Leg 146; Miocene; Mollusca; Neogene; North America; Ocean Drilling Program; ODP Site 892; progradation; propagation rates; sea-floor spreading; Tertiary; upper Miocene; velocity;
.