Evaporites in the McKnight Formation: Evidence for a Miocene Age to Fresh Water Flushing of the Maverick Basin, Southwest TexasBy Mark E. Thompson and M. Jeff RidingsPetroleum GeologistsSan Antonio, TexasIntroductionThe Maverick Basin is a relatively small depositional basin of Mesozoic age located in extreme southwest Texas (Fig. 1). The basin originated in the Late Triassic to Early Jurassic as a rift basin created during the early formation of the Gulf of Mexico.
Volcanism across the Trans-Pecos Region of West Texas
Volcanism in the Trans-Pecos region of West Texas was limited to the period from 48 to 17 m.y. ago (late Eocene to Early Miocene times.) During this time volcanism was nearly continuous, but varied considerably in location, style, composition, volume and tectonic setting (Henry and McDowell, 1986).