scholarly journals Ophiolitic basement to a forearc basin and implications for continental growth: The Coast Range/Great Valley ophiolite, California

Tectonics ◽  
1998 ◽  
Vol 17 (4) ◽  
pp. 558-570 ◽  
Author(s):  
Nicola J. Godfrey ◽  
Simon L. Klemperer
Keyword(s):  
Coast Range ◽  
Forearc Basin ◽  
Great Valley ◽  
Continental Growth

III.—Recent Observations on the Glaciation of British Columbia and Adjacent Regions

1888 ◽  
Vol 5 (8) ◽  
pp. 347-350 ◽  
Author(s):  
Geo. M. Dawson
Keyword(s):  
British Columbia ◽  
Glacial Period ◽  
Coast Range ◽  
Coast Mountains ◽  
One Stage ◽  
Queen Charlotte Islands ◽  
Glacier Ice ◽  
Inland Ice ◽  
Great Valley ◽  
The U.S

Previous observations in British Columbia have shown that at one stage in the Glacial period—that of maximum glaciation—a great confluent ice-mass has occupied the region which may be named the Interior Plateau, between the Coast Mountains and Gold and Eocky Mountain Kanges. From the 55th to the 49th parallel this great glacier has left traces of its general southward or southeastward movement, which are distinct from those of subsequent local glaciers. The southern extensions or terminations of this confluent glacier, in Washington and Idaho Territories, have quite recently been examined by Mr. Bailley Willis and Prof. T. C. Chamberlin, of the U.S. Geological Survey. There is, further, evidence to show that this inland-ice flowed also, by transverse valleys and gaps, across the Coast Range, and that the fiords of the coast were thus deeply filled with glacier-ice which, supplemented by that originating on the Coast Range itself, buried the entire great valley which separates Vancouver Island from the mainland and discharged seaward round both ends of the island. Further north, the glacier extending from the mainland coast touched the northern shores of the Queen Charlotte Islands.

scholarly journals The birth of a forearc: The basal Great Valley Group, California, USA

Geology ◽  
2019 ◽  
Vol 47 (8) ◽  
pp. 757-761 ◽  
Author(s):  
Devon A. Orme ◽  
Kathleen D. Surpless
Keyword(s):  
North America ◽  
Detrital Zircon ◽  
Forearc Basin ◽  
Early Stages ◽  
Structural Style ◽  
Basin Development ◽  
Great Valley Group ◽  
Extensional Model ◽  
Great Valley

AbstractThe Great Valley basin of California (USA) is an archetypal forearc basin, yet the timing, structural style, and location of basin development remain controversial. Eighteen of 20 detrital zircon samples (3711 new U-Pb ages) from basal strata of the Great Valley forearc basin contain Cretaceous grains, with nine samples yielding statistically robust Cretaceous maximum depositional ages (MDAs), two with MDAs that overlap the Jurassic-Cretaceous boundary, suggesting earliest Cretaceous deposition, and nine with Jurassic MDAs consistent with latest Jurassic deposition. In addition, the pre-Mesozoic age populations of our samples are consistent with central North America sources and do not require a southern provenance. We interpret that diachronous initiation of sedimentation reflects the growth of isolated depocenters, consistent with an extensional model for the early stages of forearc basin development.

Stages of sedimentary prism development on a convergent margin — Eocene Tyee Forearc Basin, Coast Range, Oregon, USA

2013 ◽  
Vol 103 ◽  
pp. 207-231 ◽  
Author(s):  
Manasij Santra ◽  
Ronald J. Steel ◽  
Cornel Olariu ◽  
Michael L. Sweet
Keyword(s):  
Coast Range ◽  
Convergent Margin ◽  
Forearc Basin
Sign in / Sign up

Export Citation Format

Share Document