Tectonic and geologic implications of the Zodiac Fan, Aleutian abyssal plain, Northeast Pacific

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doi: 10.1130/0016-7606(1983)94<259:TAGIOT>2.0.CO;2
Author(s): Stevenson, Andrew J.; Scholl, David W.; Vallier, Tracy L.
Author Affiliation(s): Primary:
U. S. Geol. Surv., Menlo Park, CA, United States
Volume Title: Geological Society of America Bulletin
Source: Geological Society of America Bulletin, 94(2), p.259-273. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7606 CODEN: BUGMAF
Note: In English. 72 refs.; illus. incl. sketch maps
Summary: Upper Eocene through lower Oligocene turbidites. Well-developed channel distributary system; four major channels have been identified with the following relative age relation (> = older than): Sagittarius > Aquarius > Taurus, and Sagittarius > Seamap. A minimum drainage of 500,000 km2 is believed necessary to have supplied the sediment to form the fan. Tertiary plate-motion models requiring large amounts of relative covergence along the Aleutian Trench are judged unworkable. As the minimum drainage is already equal to one-half of the State of Alaska, any major expansion is judged unreasonable. Relative convergence at the Aleutian Trench limited to less than ∼ 500 km from 40 m.y. B.P. to present; possibly a significant portion of southern Alaska moved in concert with the Pacific Plate since the upper Eocene. Modified journal abstract.
Year of Publication: 1983
Research Program: DSDP Deep Sea Drilling Project
Key Words: 07 Marine Geology and Oceanography; Abyssal plains; Alaska; Aleutian abyssal plain; Algae; Cenozoic; Channels; Continental drift; DSDP Site 183; Deep Sea Drilling Project; Deep-sea sedimentation; East Pacific; Geophysical methods; Geophysical surveys; Gulf of Alaska; Leg 19; Marine sedimentation; Microfossils; Miospores; Movement; Nannofossils; North Pacific; Northeast Pacific; Ocean floors; Oceanography; Pacific Ocean; Paleocene; Paleogene; Paleogeography; Palynomorphs; Plantae; Plate tectonics; Provenance; Sedimentation; Seismic methods; Structural controls; Surveys; Tectonite; Tectonophysics; Tertiary; Thallophytes; United States
Coordinates: N523417 N523419 E1611220 E1611219
Record ID: 1983025629
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