Download or read book Correlation Between Surface and Subsurface Sections of the Ellenburger Group of Texas written by Leo Hendricks and published by . This book was released on 1952 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subdivision and Subsurface Correlation of the Ellenburger Group in North central Texas written by Charles Leo Hendricks and published by . This book was released on 1942 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A series of rocks known as the Ellenburger group of Texas was deposited during Upper Cambrian and Lower Ordovician time. The Ellenburger group is composed of a succession of limestones and dolomites reaching a maximum thickness of over 2000 feet, from which the group thins and disappears in certain underground areas. A series of faunal zones have been recognized within the group, which serve to identify the age of various sections found on its outcrop. The group is marked by a large unconformity at the top throughout most of its extent, but over a portion of its occurrence it is overlain by sediments of Middle Ordovician age, in apparent conformity. Interpretation of faunal evidence has indicated that an unconformity exists at the base of the group. The structural attitude of the Ellenburger is obscured by the unconformity at its top, since contours drawn on the old erosion surface actually present a topographic picture rather than an unmodified structural picture. The sedimentary history of the Ellenburger is not known, hence there is uncertainty as to what part of the change in thickness exhibited by the group is due to non-deposition, and what part is due to erosion subsequent to deposition. Further, a close correlation between the outcropping beds and those in the subsurface extension of the group has not been established. Fossils are never found in well cuttings from the Ellenburger, and only very rarely in cores, hence there has been no age correlation of the subsurface sections. This paper is concerned with the discovery and application of a means of solving the Ellenburger problems outlined above. The recognition of correlative units within the group which are evident from both surface and subsurface data is essential to the solution. Such units must have a lithologic basis, since fossils are not recoverable from well cuttings. The Ellenburger group exhibits a variable alternation of limestones and dolomites of varying textures, which do not offer means of correlation. The insoluble residues from these limestones and dolomites, however, show characteristics peculiar to certain units within the group. The plan of the present paper is to describe these units, show their relation to the faunal units recognized on the outcrop of the group, and illustrate their occurrence in a portion of the subsurface. From the extent and relationships of these units conclusions may be drawn as to the structural and stratigraphic relationships of the Ellenburger group, and the age of the subsurface sections may be determined. A study of samples from the subsurface extent of the Ellenburger has been carried on by the writer over a period of several years. During the years 1940 and 1941 a rapid reconnaisance survey was made of the entire Ellenburger outcrop area, with selected sections studied in detail. In the summer of 1940 a detailed map was made of an area in southeastern San Saba County, showing the outcrop of the recognized subdivisions. The results obtained from those studies form the basis for this report"--Leaves 4-6
Download or read book Depositional Systems and Karst Geology of the Ellenburger Group Lower Ordovician Subsurface West Texas written by Charles Kerans and published by . This book was released on 1990 with total page 84 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 1957 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy of the Pre Simpson Paleozoic Subsurface Rocks of Texas and Southeast New Mexico written by Virgil Everett Barnes and published by . This book was released on 1959 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Conodont Biostratigraphy written by Walter C. Sweet and published by Geological Society of America. This book was released on 1970-01-01 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin of the American Association of Petroleum Geologists written by American Association of Petroleum Geologists and published by . This book was released on 1958 with total page 1748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy and Petrology of Buck Hill Quadrangle Texas written by Samuel S. Goldich and published by . This book was released on 1949 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of Investigations written by and published by . This book was released on 1952 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Permian Basin Geology written by West Texas Geological Society. Bibliography Committee and published by . This book was released on 1967 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The University of Texas Publication written by and published by . This book was released on 1962 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of Investigations written by University of Texas at Austin. Bureau of Economic Geology and published by . This book was released on 1970 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mining Engineering written by and published by . This book was released on 1953 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Ground water Resources of the Paleozoic and Cretaceous Aquifers in the Hill Country of Central Texas written by Robert L. Bluntzer and published by . This book was released on 1992 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evaluation of the ground-water resources as part of the Hill Country area of central Texas includes all or part of Bandera, Blanco, Comal, Gillespie, Hays, Kendall, Kerr, Medina, and Travis Counties. This report was prepared in response to the Sixty-ninth Texas Legislature's passage of House Bill 2 which stipulated the identification and study of areas within the State that are experiencing or expected to experience within the next 20 years critical ground-water problems.
Download or read book List of Publications written by University of Texas at Austin. Bureau of Economic Geology and published by . This book was released on 1995 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1986 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin Geological Survey written by Indiana. Geological Survey and published by . This book was released on 1957 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
