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Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone: Upper surface if quartzitic sandstone in lower part of Wilcox group in a field near the highway, 3 miles southwest of Sulphur Springs, Hopkins County, Texas. Circa 1942. Plate 5-C, in U.S.Geological Survey Professional paper 243. 1952.
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Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone: A mass of quartzitic sandstone near the highway, 3.5 miles southwest of Sulphur Springs, showing root impressions at the broken end and pits marking the upper end of root impressions. Hopkins County, Texas. Circa 1942. Plate 5-D, in U.S.Geological Survey Professional paper 243. 1952.


    map background search result map search result map Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone. Hopkins County, Texas. 1942. Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone. Hopkins County, Texas. 1952. Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone. Hopkins County, Texas. 1942. Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone. Hopkins County, Texas. 1952.