Geologic map that depicts surface geology of Swisher, Briscoe, Hall, and Childress Counties and parts of Randall, Armstrong, Donley, Collingsworth, Hale, Floyd, Motley, and Cottle Counties. This map was published as a memorial to William Fletcher Cummins, who pioneered in mapping West Texas geology and specialized in the study of Permian rocks of West Texas and New Mexico. These rocks are depicted in the eastern two-thirds of the Plainview Sheet.

Geologic map that depicts the surface geology of El Paso County and parts of Hudspeth. Jeff Davis, and Culberson Counties, Texas. The 12-page booklet indicates geologic formations, abbreviations, and ages. Published in honor of E. Russell Lloyd, distinguished Texas independent petroleum geologist, who prior to his death in 1955 edited much of the geological writing concerning the Permian Basin area. His geologic interpretation of the Capitan Limestone as a reef furnished the basis for interpretation of the associated formations and their oil-bearing possibilities.

Geologic map that depicts the surface geology of Montgomery, San Jacinto, and Hardin Counties and parts of Madison, Trinity, Polk, Tyler, Jasper, Newton, Orange, Jefferson, Liberty, Harris, Waller, Grimes, Walker, and Robertson Counties. The 4-page booklet indicates geologic formations, abbreviations, and ages. This Sheet is a memorial to the late Harold Norman Fisk, distinguished geologist who was associated with Humble Oil & Refining Company at the time of his death in 1964. Dr.