Category:Ellis Group (geology)
Subcategories
This category has the following 3 subcategories, out of 3 total.
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Media in category "Ellis Group (geology)"
The following 3 files are in this category, out of 3 total.
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Big Spring Creek Lewistown Montana 16.JPG 3,264 × 2,448; 3.17 MB
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USGS Map with Sphinx Conglomerate Annotated.jpg 5,550 × 6,516; 4.12 MB
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Williston Basin stratigraphic column.jpg 178 × 799; 59 KB