scholarly journals Does the Great Valley Group contain Jurassic strata? Reevaluation of the age and early evolution of a classic forearc basin

Geology ◽  
2006 ◽  
Vol 34 (1) ◽  
pp. 21 ◽  
Author(s):  
Kathleen D. Surpless ◽  
Stephan A. Graham ◽  
Jacob A. Covault ◽  
Joseph L. Wooden
Geology ◽  
2019 ◽  
Vol 47 (8) ◽  
pp. 757-761 ◽  
Author(s):  
Devon A. Orme ◽  
Kathleen D. Surpless

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.


Island Arc ◽  
2011 ◽  
Vol 20 (3) ◽  
pp. 346-370 ◽  
Author(s):  
ALLAN GIL S. FERNANDO ◽  
HIROSHI NISHI ◽  
KAZUSHIGE TANABE ◽  
KAZUYOSHI MORIYA ◽  
YASUHIRO IBA ◽  
...  

Geology ◽  
2019 ◽  
Vol 47 (12) ◽  
pp. e494-e494
Author(s):  
Devon A. Orme ◽  
Kathleen D. Surpless

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