Uvalde Gravel. Caliche-cemented gravel; well-rounded pebbles and cobbles of chert, some pebbles and cobbles of quartz and igneous rocks. Thickness up to about 30 feet, occurs in part as lag gravel. Lies above Goliad Formation (Pliocene) and below Deweyville Formation (Pleistocene). Age is Pliocene or Pleistocene.
[Mapped mostly in western and northern parts of the map sheet.]

Source: Publication.

Is Pliocene or Pleistocene formation mapped in southeastern Val Verde Co, TX (Permian basin), southwestern Kinney Co, TX (Ouachita tectonic belt province), and northwestern Maverick Co, TX (Gulf Coast basin). Overlies various Lower and Upper Cretaceous units. Map unit described as caliche-cemented gravel; some boulders up to 1 ft diameter; well-rounded cobbles of chert, some cobbles of quartz, limestone, and igneous rocks; occupies topographically high areas not associated with present drainage; thickness ranges from several ft of gravel lag to 30+/-ft.

Source: GNU records (USGS DDS-6; Denver GNULEX).

Pamphlet [p. 1]. Uvalde Gravel. Caliche-cemented gravel; some boulders up to one foot in diameter; well-rounded cobbles of chert, some cobbles of quartz, limestone, and igneous rock; occupies topographically high areas not associated with present drainage; forms extensive deposits in Medina and Uvalde Counties, [Texas]; may correlate with Willis Formation of Seguin Sheet; thickness ranges from several feet of gravel lag to 20+/- feet. Most intervening scarps between the Uvalde Gravel and the Leona Formation are covered by several feet of gravel slope wash. Age is Pliocene or Pleistocene.
[Notable exposures in southwestern part of map sheet, between San Antonio and Uvalde, in Frio, Medina, Uvalde, and Zavala Cos., southern TX.]

Source: Publication.