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Cambrian–Ordovician strata in Central Texas are a major source of specialty sand for hydraulic fracturing and have potential to play a bigger role in proppant supply to markets in and around Texas. Sandstone in the Hickory Member of the Riley Formation is suitable in compressive strength, as well as grain size and shape to be used as proppant. The Hickory sandstone forms the basal sequence that non-conformably...
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