Devonian Trilobite, Phacops rana, Silica shale, Sylvania, Ohio
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Daidal acanthocercus, a complete 53 mm hoplocarid. Heath Shale Formation. Bear Gulch Limestone. Bear Gulch, Fergus County, Monta
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Retorts
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Mancos Shale Strike Valley
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Hatshepsut's Mortuary Temple oblique view
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Fern leaf fossil in Hermit Shale
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EIA Tight Shale Regions.PNG
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Strange Rocks in cliff at Widemouth Bay
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Creatures of the Burgess Shale
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Metacoceras cornatum, Lower Lake Bridgeport Shale, Canyon Group, Upper Pennsylvanian, Lake Brideport, Runaway Bay area, Texas
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