The Coahuila Coal District (Sabinas area) is located in the east-central part of the state of Coahuila between 26°45′ and 27°70′N, and 100°15′ and 102°00′W in the Coahuila Basin and Range physiographic province. The area covers approximately 30,000 km2 , and the existence of coal has been established in subbasins of widely varying dimensions: La Esperanzas, Sabinas, Saltillito-Lampacitos, San Salvador, Castaños, Las Adjuntas, Monclova, and San Patricio (Fig. 1). The Río Escondido coal basin, to the northeast, is discussed in Chapter 9 of this volume.
The region is one of extensive plains and bolsons within which the coal-bearing subbasins occupy synclinal structures separated by steeply dipping anticlinal limestone ranges. Climate and vegetation are semidesert; as typical for northern Mexico, seasonal temperature differences are pronounced. The dentritic, generally south-southeast drainage is controlled by Ríos Alamo, Salado, Monclova, and San Juan, draining into the southeastflowing Rio Sabinas.
Figures & Tables
This volume was developed, produced, and privately printed in Mexico, in Spanish, by the late Ing. G.P. Salas in 1988, as a Mexican contribution to the Geology of North America, with the understanding that it would be translated into English for inclusion in the set. The translation is by Dr. Cecily Petzall of Caracas, Venezuela, with considerable figure translation and redrafting provided by GSA. Salas worked on the volume until his death, with much valuable help from Ing. Hugo Cortez Guzmán. The result is a valuable English-language synthesis of the information available to Salas in the early to mid-1980s about the geothermal, coal, and metal-mining sectors (and some non-metallic resources) of the economic geology of Mexico.