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 |
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| 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 Other: 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. |