U.S. GEOLOGICAL SURVEY EIGHTEENTH ANNUAL REPORT PART II. PL. XXVII EDWARDS PLATEAU AND PECOS CANYON AT THE SOUTHERN PACIFIC RAILROAD BRIDGE. The canyon has been cut into the Edwards limestone.

U.S. GEOLOGICAL SURVEY EIGHTEENTH ANNUAL REPORT PART II. PL. XXVII
EDWARDS PLATEAU AND PECOS CANYON AT THE SOUTHERN PACIFIC RAILROAD BRIDGE. The canyon has been cut into the Edwards limestone.

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GEOLOGY OF THE EDWARDS PLATEAU AND RIO GRANDE PLAIN ADJACENT TO AUSTIN AND SAN ANTONIO, TEXAS, WITH REFERENCE TO THE OCCURRENCE OF UNDERGROUND WATERS.
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