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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract


Pub. Id: A110 (1982)

First Page: 155

Last Page: 165

Book Title: M 34: Studies in Continental Margin Geology

Article/Chapter: Continental Oceanic Crustal Transition in the Gulf Coast Geosyncline: Rifted Margins: Field Investigations of Margin Structure and Stratigraphy

Subject Group: Geologic History and Areal Geology

Spec. Pub. Type: Memoir

Pub. Year: 1982

Author(s): Abou-Bakr K. Ibrahim (*), Elazar Uchupi

Abstract:

Seismic refraction measurements indicate that the transition from rifted continental crust to oceanic crust takes place at a water depth of over 3000 m northwest of Cuba between the Florida and Campeche escarpments. Along the eastern flank of the Mississippi Embayment, the transition occurs at about 2500 m deep and on the embayment itself inboard of the coast. Off south Texas the boundary between the rifted continental crust and oceanic crust is near the shelf's edge, off Mexico the boundary is on the continental slope, and off Campeche Bank the boundary is about 100 km northwest of Campeche Escarpment. In the northern Gulf an oceanic crustal high may lie beneath the upper continental slope. This high served as a foundation for a Mesozoic reef. Maximum sediment ac umulation took place along the contact between the rifted continental crust and oceanic crust.

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