Major Cretaceous volcanic province in southern Rockall Trough

Details Major Cretaceous volcanic province in southern Rockall Trough Major Cretaceous volcanic province in southern Rockall Trough

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..91..198s&link_type=abstract

Earth and Planetary Science Letters, Volume 91, Issue 1-2, p. 198-204.

Computer Science

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Scientific paper

A group of three large curvilinear ridges, called the Barra Volcanic Ridge System, has been mapped in the acoustic basement of southern Rockall Trough. Typically, each ridge is about 2 km high and 20 km wide at its base. A crudely-layered acoustic character, moderate density but high strength of magnetisation point to a volcanic-sedimentary (ash?) composition for the ridges. Seismic continuity with the acoustic basement of the rest of Rockall Trough suggests that the trough basement is of similar composition. An age for the ridges of Lower Cretaceous is indicated by well ties and consideration of regional geology. Volumetrically, the ridges are on the scale of hot spot features such as the Wyville-Thomson Ridge.

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