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The Eagle Ford quadrangle includes an area of 62 square miles in western Dallas County. It is bounded by the parallels 32°45'00" and 32°52'30" N, and by the meridians 96°52'30" and 97°00'00" W. The towns of Irving and Eagle Ford are in the area, as are portions of Grand Prairie and Arcadia Park. A network of paved highways and graveled roads makes most of the quadrangle readily accessible by automobile. Physiographically, this area is part of the Black Prairie, a province of low relief in which the landscape has been largely shaped by running water. West and Elm forks of the Trinity River, with their tributaries, form a dendritic pattern over the Eagle Ford area.

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