Seven maps depicting general geology, physical properties, environmental geology, soils, soil thickness, slope, and fracture intensity describe the land in the Lake Travis vicinity. The maps, descriptive text, and interpretive ...

The San Pedro Zacapa quadrangle lies along the valley of the Río Ulúa, just southwest of Lago de Yojoa in west-central Honduras. Most of the area lies within the sierras of northern Central America; volcanic ranges and ...

Carboniferous sedimentary rocks in eastern San Saba County and western Lampasas County are composed of an assemblage of lithosomes now assigned to the Houy, Chappel, Barnett, Marble Falls, Smithwick, and Strawn formations. ...

The Montaña de Comayagua structural belt is a zone trending N. 60° W., more than 130 kilometers long, of exposed earliest Tertiary and older rocks that were complexly deformed during the Laramide orogeny. The Honduras ...

The Eastern Shelf was a constructional platform developed on the margin of the sediment-starved Midland Basin during Late Pennsylvanian and Early Permian time. A mixed terrigenous-carbonate sedimentary province characterized ...

An ash-flow sheet, to which the names Mitchell Mesa Rhyolite and Brite Ignimbrite have been applied, crops out prominently in Presidio and western Brewster Counties, Texas. Because of its great areal extent it is the most ...

The El Rosario Quadrangle, situated 100 kilometers northwest of the capital, Tegucigalpa, on the Carretera del Norte, straddles the boundary between the Volcanic Ranges and Plateaus and the Central American Cordillera ...

Quantitative prediction of littoral drift, the longshore transport of sediment in the surf zone of beaches is highly useful in the design of coastal engineering works such as harbor entrances, groin fields, and beach ...

A major focus of environmental geologic work for the foreseeable future will be on the growing urban areas of the world. A systematic methodology for investigating the environmental geology of such areas can be developed ...