At 10 pm (CDT) on Friday, July 31, 1970, a tropical squall struck the western tip of Cuba causing property damage and the loss of 5 lives. Twelve hours later at 10 am (CDT), Saturday, August 1, the tropical depression had moved 150 miles northwest and had intensified into Tropical Storm Celia. At 5 pm (CDT) the same day, Celia was located about 225 miles northwest of Cuba with 75-mile-per-hour cyclonic winds classifying her as a full-fledged hurricane.

This work was begun in 1964 and substantially completed in 1965; at that time conodont zones had been established in North America only for the Upper Devonian, by Clark and Becker (1960) for the Great Basin and Collinson, Scott, and Rexroad (1962) for the mid-continent. Little was known of the conodonts of the New York section; there was almost no information on the Lower Devonian succession, and there was no published account of the Middle Devonian succession.

Geologic map that depicts the  surface geology of Hansford, Ochiltree, and Lipscomb Counties and parts of Moore, Hutchinson, Roberts, Hemphill, and Sherman Counties.

Five main depositional systems of the Jackson Group in Texas are delineated through regional outcrop and subsurface investigation. Dominant element in the central and eastern Texas Gulf Basin is the Fayette fluvial-delta system (bounded by Guadalupe River on the south and Neches River on the east) consisting of dip-oriented, lobate wedges of sands, muds, and lignites. Vertical sequence in updip subsurface and outcrop grades upward from marine muds through delta facies into fluvial sands and muds, reflecting net regression and progradation of the system.

Geologic maps that depicts the surface geology of McLennan, Limestone, and Falls Counties and parts of Bosque, Hill, Navarro, Freestone, Leon, Madison, Robertson, Milam, Bell, Lampasas, Coryell, and Hamilton Counties, Texas. The 8-page booklet indicates geologic formations, abbreviations, and ages.