Vallier, Tracy L.; Dean, Walter E.; Rea, David K.; Thiede, Joern (1983): Geologic evolution of Hess Rise, central North Pacific Ocean. Geological Society of America (GSA), Boulder, CO, United States, Geological Society of America Bulletin, 94 (11), 1289-1307, georefid:1983-058661

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.
West: 174.0000 East: -179.0000 North: 40.0000 South: 33.0000
Expedition: 32
Site: 32-310
Expedition: 62
Site: 62-464
Site: 62-465
Site: 62-466
Data access:
Provider: SEDIS Publication Catalogue
Data set link: (c.f. for more detailed metadata)
This metadata in ISO19139 XML format