"Geological Map of a Portion of West Texas Showing Parts of Brewster, Presidio, Jeff. Davis, and El Paso Counties, and South of the Southern Pacific R.R.",

This very early geological map of western Texas was issued at a time when the oil boom in East Texas was just beginning following the discovery of oil at Spindletop in 1901. It was compiled by Benjamin F. Hill and J.A. Udden and issued in The University of Texas Mineral Survey under the direction of William B. Phillips. The map extends from Brewster County (Big Bend) north to Fort Hancock (below El Paso) and highlights the geology adjacent to the Rio Grande River. A legend at lower right identifies 13 different geological types including Quicksilver, Coal, Silver and Lead, granite and Syenite, and more. Base data was provided by USGS topographical sheets and includes topography, watersheds, railroads, settlements, and more. North is oriented to the top left corner of the sheet. Drawn by C.P. Scrivener and lithographed by Matthews-Northrup.

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Condition: B

Issued folding with toning along the right edge. There is some minor soiling at left and a few extraneous creases.