Geology of the Ferris Quadrangle, Dallas and Ellis counties, Texas

The Ferris Quadrangle in southern Dallas and northern Ellis counties, Texas, is underlain by the Austin Chalk and Taylor Marl, both of Upper Cretaceous age. Two members of the Austin, the middle marl and the upper chalk, along with the lower blue-gray unit of the Taylor Marl, crop out within the area. The Austin-Taylor contact, within the area in Dallas County, is transitional and consists of chalk and marl sequences intermediate in lithology between the two formations. The contact in Ellis County is marked by a reddish-brown clay zone containing phosphate nodules, indicating an unconformity. Approximately one-half of the area is covered by two Quaternary terraces and recent alluvium. A large, northeast-trending, normal fault with a minimum displacement of 150 feet is exposed on Bear Creek in the southwest corner of the quadrangle. Taylor Marl has been downfaulted on the northwest against Austin Chalk on the southeast. It is probably a part of the Balcones Fault System

Geologic Review of Proposed Dallas -Fort Worth Area Site for the Superconducting Super Collider (SSC)

In June 1987, the Texas National Research Laboratory Commission tasked the Bureau of Economic Geology at The University of Texas at Austin with reviewing and providing a brief report on the geology of the proposed site for the Superconducting Super Collider (SSC) in the Dallas-Fort Worth area. Additionally, they requested a surface geologic map of the site. An informal task force was assembled for this purpose, comprising Jay A. Raney (Coordinator and Structural Geology) from the Bureau of Economic Geology, Peter M. Allen (Environmental Geology and Stratigraphy) from Baylor University, Donald F. Reaser (Structural Geology and Stratigraphy) from The University of Texas at Arlington, and Edward W. Collins (Structural Geology) from the Bureau of Economic Geology. This report by the task force provides an explanatory note for the geologic map (Plate 1) of the proposed site near Waxahachie, Texas.Bureau of Economic Geolog

Geology of the Ferris Quadrangle, Dallas and Ellis counties, Texas

The Ferris Quadrangle in southern Dallas and northern Ellis counties, Texas, is underlain by the Austin Chalk and Taylor Marl, both of Upper Cretaceous age. Two members of the Austin, the middle marl and the upper chalk, along with the lower blue-gray unit of the Taylor Marl, crop out within the area. The Austin-Taylor contact, within the area in Dallas County, is transitional and consists of chalk and marl sequences intermediate in lithology between the two formations. The contact in Ellis County is marked by a reddish-brown clay zone containing phosphate nodules, indicating an unconformity. Approximately one-half of the area is covered by two Quaternary terraces and recent alluvium. A large, northeast-trending, normal fault with a minimum displacement of 150 feet is exposed on Bear Creek in the southwest corner of the quadrangle. Taylor Marl has been downfaulted on the northwest against Austin Chalk on the southeast. It is probably a part of the Balcones Fault System