The Gravina Sequence: Remnants of a Mid-Mesozoic oceanic arc in southern southeast Alaska

• Published in: Journal of Geophysical Research: Solid Earth
• Main Authors: Rubin, Charles M., Saleeby, Jason B.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: American Geophysical Union 1991
• Subjects: Taku; Ketchikan; Alaska
• Online Access: https://doi.org/10.1029/91JB00591

Fragments of Upper Jurassic to Lower Cretaceous volcanic and basinal strata constitute the Gravina belt in southeast Alaska. In the Ketchikan area the Gravina belt is made up of two lithotectonic units. The lower unit consists of coarse marine pyroclastic and volcaniclastic strata, mafic flows, brec...