Vallier, Tracy L. et al. (1983): Geologic evolution of Hess Rise, central North Pacific Ocean

Leg/Site/Hole:
DSDP 32
DSDP 62
DSDP 32 310
DSDP 62 464
DSDP 62 465
DSDP 62 466
Identifier:
1983-058661
georefid
Creator:
Vallier, Tracy L.
U. S. Geol. Surv., Menlo Park, CA, United States
author
Dean, Walter E.
Univ. Mich., United States
author
Rea, David K.
Univ. Oslo, United States
author
Thiede, Joern
author
Identification:
Geologic evolution of Hess Rise, central North Pacific Ocean
1983
Geological Society of America Bulletin
Geological Society of America (GSA), Boulder, CO, United States
94
11
1289-1307
DSDP sites 310, 464, 465, and 466; seismic-reflection profiles. Response of sedimentation to subsidence and northward movement of Hess Rise on the Pacific Plate. Three northwest-trending arms, or ridges, and an east-northeast-trending southern Hess Rise that parallels the Mendocino Fracture Zone. Tholeiitic basalt and alkalic basalt clasts within sediments. A major rock unit is Middle Cretaceous limestone, chalk, and minor chert. Organic-carbon-rich sediments. Sediments from across the Cretaceous-Tertiary boundary show a significant decrease in surface water temperature and biological productivity, and an abrupt increase in transition metals and iridium.--Modified journal abstract.
English
Serial
Coverage:Geographic coordinates:
North:40.0000
West:174.0000East: -179.0000
South:33.0000
Oceanography; basalts; bottom features; Cenozoic; chemically precipitated rocks; chert; cores; Cretaceous; Deep Sea Drilling Project; deep-sea sedimentation; DSDP Site 310; DSDP Site 464; DSDP Site 465; DSDP Site 466; faults; fracture zones; geochemistry; geophysical methods; geophysical surveys; Hess Rise; igneous rocks; IPOD; iridium; isotopes; Leg 32; Leg 62; marine sedimentation; marine sediments; Mesozoic; metals; North Pacific; Northwest Pacific; ocean floors; oceanography; organic compounds; organic materials; Pacific Ocean; plate tectonics; plateaus; platinum group; reflection methods; sedimentary rocks; sedimentation; sedimentation rates; sediments; seismic methods; stratigraphic boundary; surveys; tectonic elements; Tertiary; tholeiitic basalt; trace elements; volcanic rocks; West Pacific;
.