Download or read book Tertiary Formations of Rim Rock Country Presidio County Trans Pecos Texas written by Ronald Kinnison DeFord and published by . This book was released on 1958 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tertiary Formations of Rim Rock Country Presidio County Trans Pecos Texas written by Ronald Kinnison DeFord and published by . This book was released on 1958 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tertiary Formations of Rim Rock Country Predisio County Trans Pecos Texas written by Ronald K. DeFord and published by . This book was released on 1958 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Economic geology of Rim Rock country written by Don Gene Bilbrey and published by . This book was released on 1957 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oligocene Volcanism and Multiple Caldera Formation in the Chinati Mountains Presidio County Texas written by Joseph C. Cepeda and published by . This book was released on 1983 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey Bulletin written by and published by . This book was released on 1965 with total page 1030 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cenozoic Stratigraphy of Rim Rock Country Trans Pecos Texas written by John Theodore Schulenberg and published by . This book was released on 1958 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Rim Rock country, on the western edge of a vast Trans-Pecos Texas lava field, received thousands of feet of volcanic material during the Tertiary Period. Although pyroclastic rocks predominate, several flow rocks form the most distinctive stratigraphic markers. Dikes, sills, and laccoliths were emplaced following the cessation of extrusive igneous activity. The Vieja Group, comprising the oldest volcanic strata, has been tentatively assigned to the Chadronian Stage (Lower Oligocene). Late Tertiary block-faulting created an intermontane area which subsequently received thick bolson deposits. Recent climatic fluctuations have resulted in the development of gravel-capped terraces along the Rio Grande.
Download or read book Compilation of Potassium argon Ages of Tertiary Igneous Rocks Trans Pecos Texas written by and published by . This book was released on 1986 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Igneous Geology of Trans Pecos Texas written by and published by . This book was released on 1986 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In the Shadow of the Chinatis written by David W. Keller and published by Texas A&M University Press. This book was released on 2019-01-31 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winner, 2020 Al Lowman Memorial Prize for Best Book on Texas County or Local History There is a deep and abiding connection between humans and the land in Pinto Canyon—a remote and rugged place near the border with Mexico in the Texas Big Bend. Here the land assumes a certain primacy, defined not by the ephemera of plants and animals but by the very bedrock that rises far above the silvery flow of Pinto Creek— looming masses that break the horizon into a hundred different vistas. Yet, over time, people managed to survive and sometimes even thrive in this harsh environment. In the Shadow of the Chinatis combines the rich narratives of history, natural history, and archeology to tell the story of the landscape as well as the people who once inhabited it. Settling the land was difficult, staying on it even more so, but one family proved especially resilient. Rising above their meager origins, the Prietos eventually amassed a 12,000-acre ranch in the shadow of the Chinati Mountains to become the most successful of Pinto Canyon’s early settlers. But starting with the tense years of the Great Depression, the family faced a series of tragedies: one son was killed by a Texas Ranger, and another by the deranged son of Chico Cano, the Big Bend’s most notorious bandit. Ultimately, growing rifts in the family forced the sale of the ranch, marking the end of an era. Bearing the hallmarks of an epic tragedy, the departure of the Prieto family signaled a transition away from ranching towards a new style of landownership based on a completely different model. Today, Pinto Canyon’s scenic and scientific value increasingly overshadows the marginal economics of its past. In the Shadow of the Chinatis reveals a rich tapestry of interaction between humans and their environment, providing a unique examination of the Big Bend region and the people who call it home.
Download or read book Petrology of the Mitchell Mesa Rhyolite Trans Pecos Texas written by Edward R. Burt and published by . This book was released on 1970 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 important unit for correlation in the Tertiary volcanic field of southern Trans-Pecos Texas, and it should bear a single name. Priority and widespread use in published literature support the name Mitchell Mesa. The ash-flow sheet is divisible into two cooling-units. The lower, a simple cooling-unit that grades locally into a compound cooling-unit, is a vitric-crystal rhyolitic ash-flow tuff with 15 to 25 percent opalescent alkali feldspar and bipyramidal quartz phenocrysts as long as 4 mm in a light brownish gray, grayish pink, or light gray vesiculated groundmass. The lower cooling-unit ranges in thickness from about 230 feet immediately north of Pinto Canyon to 2 feet at South Lajitas Mesa. The upper, simple cooling-unit is a vitric-lithic ash-flow tuff with as much as 20 percent lithic fragments in a very light gray to brownish gray groundmass containing about 10 percent non-opalescent alkali feldspar and quartz phenocrysts. The upper unit ranges in thickness from 60 to 100 feet. Its only outcrops are overlain by Petan Basalt north and northeast of Pinto Canyon. Except in a few places, the pyroclastic texture of the lower cooling-unit was obliterated by vapor-phase crystallization. Any tridymite and cristobalite originally present were subsequently converted to quartz. Four whole-rock chemical analyses of samples from widely separated localities are similar, showing only minor variations in K2o and Na2o. The alkali feldspar phenocrysts are richer in Na2O and poorer in K2O than the whole rock. Therefore the feldspar in the groundmass is more potassic than that in the phenocrysts. Foreign inclusions are most abundant in outcrops of Mitchell Mesa Rhyolite closest to the Chinati Mountains. Immediately north of the mountains, a separate ash-flow tuff is present beneath the Mitchell Mesa Rhyolite. This and other evidence leads to the conclusion that the Chinati Mountains area was the source of the ash-flow sheet.
Download or read book Revised Cenozoic History of Rim Rock Country Trans Pecos Texas written by Luther Wadsworth Bridges and published by . This book was released on 1958 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Early Tertiary Vertebrate Faunas Vieja Group Trans Pecos Texas written by John Andrew Wilson and published by . This book was released on 1971 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Big Bend National Park Biosphere Reserve Bibliography written by John A. Bissonette and published by . This book was released on 1985 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cenozoic Geology of the Trans Pecos Volcanic Field of Texas written by and published by . This book was released on 1979 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Circular written by and published by . This book was released on 1986 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Circular University of Texas at Austin Bureau of Economic Geology written by and published by . This book was released on 1967 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
