Yadkin Graywacke

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Series: GSA Field Guide
Published: 01 January 2017
DOI: 10.1130/2017.0047(01)
EISBN: 9780813756479
.... Layered leucogranitic gneiss (Y) is overlain by conglomerate (C), graywacke (M), and siltstone (P); cross-bedded orthoquartzite (Q) crops out beyond the truck in the distance. (C) Photograph of the basal conglomerate, consisting of well-rounded cobbles and boulders derived from the underlying gneiss...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2433(14)
... Swamp Member of the Cid Formation have been dated by U-Pb zircon methods at 541 ± 1 Ma ( Ingle et al., 2003 ). Carolinian arc-magmatic and associated sedimentary rocks are unconformably overlain by 1–2 km of fossiliferous, shallow-marine, Middle Cambrian mudstone-quartz graywacke of the Asbill Pond...