Early evolution of the Bering Sea by collision of oceanic rises and North Pacific subduction zones.

Z. Ben-Avraham, A. K. Cooper

Research output: Contribution to journalArticlepeer-review

Abstract

Three major bathymetric features exist in the Bering Sea: Shirshov Ridge, Bowers Ridge, and Umnak Plateau. New refraction data over Umnak Plateau and previous geophysical data across Bowers Ridge indicate that a thickened welt of crustal material is present beneath both features. The crustal structure is transitional between oceanic and continental types. Various models for the origin of these features have been investigated. One that has not been proposed previously assumes that the protostructures of Bowers Ridge and Umnak Plateau could have formed outside of the present Bering Sea. According to this model, before formation of the Aleutian Ridge in late Mesozoic or earliest Tertiary time, these protostructures moved into their present Bering Sea positions. -Authors

Original languageEnglish
Pages (from-to)485-495
Number of pages11
JournalBulletin of the Geological Society of America
Volume92
Issue number7 pt1
DOIs
StatePublished - 1981
Externally publishedYes

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