Secondary leached porosity is common to dominant in near surface to deep subsurface lower Tertiary sandstone reservoirs along the Texas Gulf Coast. This secondary porosity is in the form of leached feldspar grains, volcanic rock fragments, carbonate cements, and carbonate-replaced grains.

Benthic samples were collected on a 1-mi grid from Copano Bay, Texas, in March and April, 1976. Seventy-four molluscan species, including 33 pelecypods, 40 gastropods, and 1 scaphopod were taken from 93 stations in Copano Bay.

Land and water resources have been analyzed in the Corpus Christi area--Aransas, Nueces, Refugio, and San Patricio Counties along the central Texas coast. The city and port of Corpus Christi compose the largest metropolitan center in the area.

Sequential shoreline monitoring, using vintage chans and aerial photographs, documents temporal and spatial variations in historical Gulf shoreline changes.

Disposal and temporary surface storage of spent geothermal fluids and surface subsidence and faulting are the major environmental problems that could arise from geopressured geothermal water production.

The Texas Coastal Zone is marked by diversity in geography, resources, climate, and industry.

The Texas Coastal Zone is marked by diversity in geography, resources, climate, and industry.

Knowledge of the regional sand distribution and its relationship to formation temperature and pressure is a preliminary step in evaluating the geothermal resources of the Frio Formation.

Geologic map that depicts the surface geology of Goliad, Refugio, and Calhoun Counties and parts of Karnes, De Witt, Victoria, Jackson, Matagorda, Aransas, San Patricio, Bee, and Live Oak Counties. The 4-page booklet indicates geologic formations, abbreviations, and ages.