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4. Beatty, H.L., 1992. Fluvial sedimentology and sandstone petrography of the Hannold Hill Formation (Eocene), Big Bend, Texas. MS Thesis, Texas Tech University.
5. Befus, K.S., 2006. Late Cretaceous and Eocene phreatomagmatic volcanism and magma–sediment interaction in the Big Bend area of West Texas. MS Thesis, Texas Christian University.