Browsing by Author "Heintz, Mindi"
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Tephrochronology and Stratigraphy of Eocene and Oligocene Volcanic Ashes of East and Central Texas Heintz, Mindi (2013-12-02)Sedimentary formations of east and central Texas contain many Eocene to Oligocene volcanic ash beds, with some of the younger ash layers containing hydrated but otherwise unaltered glass shards. This study analyzed samples ...