The Ellenburger group of central Texas

Accompanied by 17 foldout plates -- Plate 1 : Index map of central Texas showing location of areas where the formations of the Ellenburger group have been mapped. Plate 2 : Geologic map of the Cherokee area, San Saba County, Texas. Plate 3 : Geologic map of the Johnson City area, Blanco County, Texas. Plate 4 : Geologic map of the Bald Ridge area, McCulloch County, Texas. Plate 5 : Geologic map of the Bear Spring area, Mason County, Texas. Plate 6 : Geologic map of the Lange's Mill area, Gillespie County, Texas. Plate 7 : Geologic map of a part of the Cherokee area, San Saba County, Texas. Plate 8 : Geologic map of the Tanyard area, Burnet and San Saba counties, Texas. Plate 9 : Geologic map of the Gorman Falls area, San Saba, Lampasas, and Burnet counties, Texas. Plate 10 : Geologic map of the Moore Hollow and Warren Springs areas, Riley Mountains, Llano County, Texas. Plate 11 : Geologic map of the Backbone Mountain area, Burnet and Llano counties, Texas. Plate 12 : Geologic map of a part of the Johnson City area, Blanco County, Texas. Plate 13 : Geologic map of Honeycut Bend, Blanco County, Texas. Plate 14 : Correlation of the Ellenburger group and associated rocks in central Texas. Plate 15 : Provisional correlation of some lower Ordovician rocks in the mid-Continent. Plate 16 : Columnar sections and provisional correlation of the El Paso and Beach Mountain sections, El Paso and Culberson counties, Texas. Plate 45 : Diagrammatic representation of the Ellenburger group and Wilberns formation in the Llano uplift of central Texas. Plate 45 : Diagrammatic representation of the Ellenburger group and Wilberns formation in the Llano uplift of central Texas