Seismic reflection reconnaissance of the Atlantic margin of Morocco

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doi: 10.1029/ME003p0205
Author(s): Watkins, J. S.; Hoppe, K. W.
Author Affiliation(s): Primary:
Gulf Sci. Technol., Houston, Tex., United States
Volume Title: Deep drilling results in the Atlantic Ocean; continental margins and paleoenvironment
Volume Author(s): Talwani, M., editor; Hay, W.; Ryan, W. B. F.
Source: Maurice Ewing Series, 3, p.205-217; Deep drilling results in the Atlantic Ocean; continental margins and paleoenvironment, Harriman, N.Y., March 19-25, 1978, edited by M. Talwani, W. Hay and W. B. F. Ryan. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0197-6346. ISBN: 978-1-118-66583-1 CODEN: MEWSDN
Note: In English. 30 refs.; illus. incl. table, sect., geol. sketch map
Summary: Data from a seismic reconnaissance of the Atlantic margin of Morocco indicate that the continental margin, like onshore Morocco, exhibits a complex structural and depositional history. In the Rharb basin, the Prerif Nappe of Tortonian (Middle Miocene) age thrusts over faulted shelf and slope sediments. Post-nappe slope sediments are undeformed. Moderate deformation of post-nappe shelf sediments probably results from diapiric movement within the mobile core of the nappe. The margin between the Canary Arch and Tarfaya basin has thick salt overlying inferred attenuated continental crust located between the present-day coast and the Canary Arch. The Canary Arch was first uplifted between Middle Cretaceous and Miocene. There is evidence of volcanism during and possibly prior to the Eocene. We find no evidence, however, for Tertiary movement along a supposed lineament extending from the South Atlas fault along the southern margin of the salt basin and into or south of the Canary Island axis. Large scale mass transport of slope sediments by gravity gliding and debris flow accounts for a significant fraction of the sediment transport budget off Morocco. The subtle character of these flows on seismic sections suggests that gravity gliding and debris flow may be more important world-wide than previously recognized. Abstract Copyright 1979 by the American Geophysical Union.
Year of Publication: 1979
Research Program: DSDP Deep Sea Drilling Project
Key Words: 18 Geophysics, Solid-Earth; Africa; Atlantic Coastal Plain; Canary Arch; Cenozoic; Continental margin; Cretaceous; Deep Sea Drilling Project; Deformation; Faults; Geophysical methods; Geophysical surveys; Mesozoic; Morocco; Movement; North Africa; Oceanography; Reflection; Research; Sedimentation; Seismic methods; Structural geology; Structure; Surveys; Tarfaya Basin; Tectonics; Tertiary; United States; Uplifts
Coordinates: N220000 N350000 W0050000 W0170000
Record ID: 1980017760
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.