Image: USGS 2006 1237 table2 Stratigraphy Middle Devonian

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Description: Stratigraphic Correlation Table. Middle Devonian portion extracted and reformatted from the original. Colours: Orange; Shale, siltstone, and sandstone; Green, Black "gas" shale; Yellow; Sandstone, chert; Stripes, Section missing; red, Red beds; blue, Limestone
Title: USGS 2006 1237 table2 Stratigraphy Middle Devonian
Credit: USGS Report 2006-1237 Table 2. Generalized stratigraphic nomenclature for the Devonian Shale- Middle and Upper Paleozoic
Author: USGS
Permission: PD
Usage Terms: Public domain
License: PD
Attribution Required?: No

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