. Annual report of the United States Geological Survey to the Secretary of the Interior . Ts, the deepest of whichis that of Trinity River. The geological formationsconsist of the Cretaceousstrata of the Washita, Fred-ericksburg, and Trinity di-visions, the Washita cappingthe highest divides and theFredericksburg and Trinityresting upon the Carbonifer-ous in the western portion ofthe county. The whole of the GrandPrairie poition is underlain by the reservoirs of the Paluxy-Trinity formation at moderate depths,. —Artesian map of Parker County, Texas. Shadedportion shows areas of possible
. Annual report of the United States Geological Survey to the Secretary of the Interior . Ts, the deepest of whichis that of Trinity River. The geological formationsconsist of the Cretaceousstrata of the Washita, Fred-ericksburg, and Trinity di-visions, the Washita cappingthe highest divides and theFredericksburg and Trinityresting upon the Carbonifer-ous in the western portion ofthe county. The whole of the GrandPrairie poition is underlain by the reservoirs of the Paluxy-Trinity formation at moderate depths,. —Artesian map of Parker County, Texas. Shadedportion shows areas of possible flowing wells; C flow-ing wells from Trinity reservoir. 456 BLACK AND GRAND PRAIRIES, but the altitude seems unpropitious for flowing- wells except imme-diately along the valley of Walnut Creek in the eastern part. Several artesian wells have been drilled which completely penetratethe artesian reservoirs, but with one or two exceptions the water failedto rise to the surface. The deepest of these wells, at Weatherford, isabout 500 feet. The onl}T flowing wells reported are from the vicinity of Springtown,on Walnut Creek, in the northeastern portion of the county. Theseare all less than 100 feet deep and begin and end in the lower part ofthe Trinity division. Several wells have been drilled at Weatherford (altitude, 870 feet),but the city is too high to procure flowing water. A good supply ofpumping water is obtained. The section of the well of the Weather-ford Water, Light, and Ice Company is
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