The Walvis Ridge transect, Deep Sea Drilling Project Leg 74; the geologic evolution of an oceanic plateau in the South Atlantic Ocean

Online Access: Get full text
doi: 10.1130/0016-7606(1983)94<907:TWRTDS>2.0.CO;2
Author(s): Moore, Theodore C., Jr.; Rabinowitz, Philip D.; Boersma, Anne; Borella, Peter E.; Chave, Alan D.; Duee, Gerard; Futterer, Dieter K.; Jiang, Ming Jung; Kleinert, Klaus; Lever, Andrew; Manivit, Helene; O'Connell, Suzanne; Richardson, Stephen H.; Shackleton, Nicholas J.
Author Affiliation(s): Primary:
Univ. R.I., Grad. Sch. Oceanogr., Kingston, RI, United States
Tex. A&M Univ., Dep. Oceanogr., United States
Lamont-Doherty Geol. Obs., United States
Scripps Inst. Oceanogr., United States
Univ. Sci. et Tech. Lille, Lab. Geol. Stratigr., France
Univ. Kiel, Geol.-Palaontol. Inst., Federal Republic of Germany
Univ. Tubingen, Geol. Inst., Federal Republic of Germany
Univ. East Anglia, Sch. Environ. Sci., United Kingdom
BRGM, Lab. Palynol., France
Woods Hole Oceanogr. Inst., United States
Mass. Inst. Technol., Dep. Earth Planet. Sci., United States
Univ. Cambridge. Godwin Lab., United Kingdom
Volume Title: Geological Society of America Bulletin
Source: Geological Society of America Bulletin, 94(7), p.907-925. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7606 CODEN: BUGMAF
Note: In English. 30 refs.; illus. incl. 5 anal., 4 tables, charts, sketch maps
Summary: Walvis Ridge formed at a mid-ocean ridge at anomalously shallow elevations. Pillowed basalt and massive flows alternating with nannofossil chalk and limestone that contain a significant volcanogenic component. Rapid sea-level lowering in the mid-Oligocene. Average accumulation rates during the Cenozoic indicate three peaks in the rate of supply of carbonate to the sea floor. Dissolution had a marked effect on sediment accumulation in the deeper sites. Flora and fauna are temperate. Cretaceous-Tertiary boundary recovered in four sites drilled, with sediments containing well-preserved nannofossils but poorly preserved foraminifera.—Modified journal abstract.
Year of Publication: 1983
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 07 Marine Geology and Oceanography; Algae; Atlantic Ocean; Basalts; Bioclastic sedimentation; Biostratigraphy; Carbonate compensation depth; Carbonate rocks; Cenozoic; Chalk; Clastic sediments; Composition; Cretaceous; DSDP Site 525; DSDP Site 526; DSDP Site 527; DSDP Site 528; DSDP Site 529; Deep Sea Drilling Project; Foraminifera; IPOD; Igneous rocks; Invertebrata; Lava; Leg 74; Maestrichtian; Marine sedimentation; Marine sediments; Mesozoic; Microfossils; Nannofossils; Ocean floors; Oceanography; Ooze; Paleoclimatology; Paleomagnetism; Plantae; Plateaus; Protista; Sea-floor spreading; Sedimentary rocks; Sedimentation; Sedimentation rates; Sediments; Senonian; South Atlantic; Southeast Atlantic; Tertiary; Thallophytes; Upper Cretaceous; Volcanic rocks; Walvis Ridge
Coordinates: S303000 S280000 E0033000 E0010000
Record ID: 1983045330
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.