 | | Journal (article/letter/editorial) | | igneous and metamorphic rocks from the Llano Uplift, Texas, was undertaken to investigate, in detail, potassiumargon...pluton and surrounding rocks from the Llano Uplift, Texas, suggests that this area has been involved in a...rocks in central Texas was by T. B. Comstock (1890), who applied the terms Packsaddle Schist and Valley...PLUTON, TEXAS 361 (1943) obtained a helium age of 1050 million years on magnetite from Llano County. More...geochronologic work on the Precambrian rocks of central Texas have included several Rb-Sr, K-Ar, U-Pb, and Th-Pb |  | | Journal (article/letter/editorial) | | calc-silicate formation : evidence from fluid inclusions and phase equilibria; llano Uplift, central Texas, USA...Department of Geology, Texas A & M University, College Station, TX 77843, USA ABSTRACT The Llano Uplift...Uplift in central Texas is a Grenville aged (c. 1.1Ga) metamorphic terrane consisting predominantly of...of amphibolite facies mineral assemblages. The formation of these assemblages has been attributed to the...solid-solid equilibria Grs + Qtz = Wo + An, yield formation conditions of XHl-550" C at 1-2 kbar. This indicates |  | | Report (volume) | | Eclogae Geologicae Helvetiae, v. 63, no. 1, p. 15-28. White, W. H., Erickson, G. P., Northcote, K. E., Dirom...UNITED STATES LEXICON Aggie Brown Member (Oahe Formation) 1. Pleistocene (Wisconsinan) and Holocene 2.... 147 N., R. 84 W., 4 km N of Riverdale, McLean County, N. Oak. Named for Aggie Brown Coulee, which flows...flows into Lake Sakakawea. Alburnett Formation 1. Pleistocene (pre-Illinoian) 2. Iowa (EC) 3. Hallberg...Paleozoic bedrock; unconformably underlies Wolf Creek Formation 10. Type section: Little Paha core section |  | | Report (volume) | | Weeks, Fred B., 1902, North American geologic formation names: U.S. Geol. Survey Bull. 191. 2. Wilmarth...reports. LEXICON Abernathy Member (of Joachim Formation) Middle Ordovician: Southeastern Missouri, southern...feet of Abernathy overlies 1 foot of Dutchtown Formation, but is on upthrown side of a fault. Basal member...74, Ph miles east of Dutchtown, Cape Girardeau County, Mo. Type section cut by northtrending fault with...stream in NEIA sec. 33, T. 16 N., R. 14 E, Wayne County. Named after village of Abington, about 3 miles |  | | Book | | Geological Sciences, Indiana University, Bloomington, USA Francisco Fuentes Carrera de GeologĂa, Universidad...University, 1001 East 10th Street, Bloomington, USA F. SepĂşlveda Servicio Nacional de GeologĂa y MinerĂa...individual zircon grains, providing timing of formation and sediment deposition and the nature of host...inherited crustal components involved during their formation. Ages in purple correspond to the metamorphic...(Cochrane unit), consisting of quartz, albite, and white mica, yielded P–T conditions of 4 ± 1.2 kbar and |  | | Book | | FACTORS 5 variety of processes involved in the formation of the industrial rocks and minerals, together...sand and gravel 1 Disodium phosphate anhydrous; white lime; caustic soda; sodium sulfite anhydrous; 58...shipped from county to would do as well), it rapidly decreases to place value is shown county, still less...et al., 1957, Geology of Gabbs and vicinity, Nye County, Nevada, U.S. Geol. Survey Map MF 52; and Vitaliano...the Gabbs magnesite and brucite deposits, Nye County, Nevada: U.S. Geol. Survey Map MF 3s. FUNDAMENTAL | | | Book | | FACTORS 5 variety of processes involved in the formation of the industrial rocks and minerals, together...sand and gravel 1 Disodium phosphate anhydrous; white lime; caustic soda; sodium sulfite anhydrous; 58...the fact that little gravel is shipped from county to county, still less from state to state, and none...al., 1957, Geology of Gabbs and vicinity, Nye County, Nevada, U.S. Geol. Survey Map MF 52; and Vitaliano...of the Gabbs magnesite and brucite deposits, Nye County, Nevada: U.S. Geol. Survey Map MF 35. FUNDAMENTAL |  | | Report (issue) | | evolution of life, nature of sedimentation, and formation of mineral deposits. The International Proterozoic...incredible variety of min¬ eral deposits. Banded iron formation, conglomerate-hosted uranium and gold deposits...differentiation of the continental crust and the formation of potash granites in uppei; levels. INTRODUCTION...broadly similar to those accreted during the formation of Proterozoic belts. This review has been largely...5491-5502. Kroner, A., 1975, Late Precambrian formation in the western Richtersveld, northern Cape Province: |  | | Book | | i s f i e l d . Therefore t h e r e c e n t formation OP t h e I n t e r n a t i o r i a l Geological...of considerable sophistication (e.g. Jakes and White, 1972; Pearce and Cann, 1972). On the basis of lithostratigraphic...1965; Folinsbee et al., 1968; Hart et al., 1970; White et al., 1971; Goodwin, 1973; Jahn et al., 1974)...a r t h a f t e r a c c r e t i o n and core-formation, t h e only s t a b l e regime i n t h e e a r...mixed-temperature meteoritic material after rapid core formation, and its admixture with more fractionated earlier |
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