...Vincent H. Isakson; Mark D. Schmitz; Carol M. Dehler; Francis A. Macdonald; W. Adolph Yonkee Abstract Tandem in situ and isotope dilution U-Pb analysis of zircons from pyroclastic volcanic rocks and both glacial and non-glacial sedimentary strata of the Pocatello Formation (Idaho, northwestern USA...

.... The easternmost occurrence of allochthonous basement is interpreted to be in the western part of the anticlinorium near the Montana-Idaho border. Comparison of the Cordilleran foreland thrust belt in northwestern Montana and southern Canada suggests that a change in the deep structure of the Purcell anticlinorium...

... a homogeneous differentiation series with a narrow range in major element distribution. The granitic plutons of northwestern Nevada are chemically and petrographically indistinguishable from granitic intrusives of equivalent age in the Sierra Nevada and Idaho batholiths, and form a link between these two major...

...Robert E. Zartman; John S. Stacey Abstract Lead isotopes are used to distinguish between Precambrian mineralization and Mesozoic or Cenozoic mineralization in an area of Belt Supergroup rocks in northwestern Montana and northern Idaho. The Precambrian lead is characterized by a comparatively...

..., Tooker, Morris, Hose, and Cheney (1965) discussed the Pennsylvanian and Permian basins in northwestern Utah, northeastern Nevada, and south-central Idaho as downwarped segments of the Cordilleran geosyncline. They stated (p. 1926): “A detailed analysis of sedimentary facies is, on the one hand...

... Geologists. All rights reserved 1967 American Association of Petroleum Geologists The principal objective in writing the paper on Pennsylvanian and Permian basins in northwestern Utah, northeastern Nevada, and south-central Idaho ( Roberts et al ., 1965 ) was to present an over-all picture...

... , Pennsylvanian and Permian basins in northwestern Utah, northeastern Nevada and south-central Idaho : Am. Assoc. Petroleum Geologist Bull. , v. 49 , no. 11 , p. 1926 – 1956 . Tooker , E. W. , and R. J. Roberts , 1961 , Stratigraphy of the north end of the Oquirrh Mountains, Utah , in Cook...

...Ralph J. Roberts; M. D. Crittenden; E. W. Tooker; H. T. Morris; R. K. Hose; T. M. Cheney ABSTRACT The Pennsylvanian and Permian basins in northwestern Utah, northeastern Nevada, and south-central Idaho are downwarped segments of the Cordilleran geosyncline superposed on a complex structural pattern...

...R. J. Roberts; E. W. Tooker; H. T. Morris; M. D. Crittenden; R. K. Hose; T. M. Cheney ABSTRACT The Oquirrh and Phosphoria basins in northwestern Utah, northeastern Nevada, and southern Idaho are downwarped segments of the Cordilleran geosyncline superposed on a complex structural pattern...

...RUSSELL GIBSON; W. F. JENKS; IAN CAMPBELL Abstract Three formations of the Belt series—Prichard, Wallace, and Striped Peak—can be traced northward from the northeastern part of the Coeur d’Alene district, Idaho, through the Trout Creek quadrangle to the northern part of the Libby quadrangle...

... the Great Basin (Spence Shale), Sonora, and to a lesser extent from northwestern Idaho. During the 1940s and 1950s, the Argentinian naturalist Carlos Rusconi discovered key Cambrian outcrops in the southern Precordillera of Mendoza, western Argentina, and described large numbers of invertebrates...

...Sarah F. Trevino; Basil Tikoff Abstract The Cretaceous intrusive units of the Sahwave and Nightingale ranges in northwestern Nevada, USA, located between the Sierra Nevada and Idaho batholiths, represent a critical segment of Cretaceous arc magmatism. U-Pb zircon age dating shows that the older...

... from Belt Supergroup (1700–1720 Ma) and ca. 1380 Ma plutonic rocks intruding the Lemhi subbasin of central Idaho (northwestern United States); (3) quartzite clasts that are statistical matches for Mesoproterozoic and Cambrian strata in Montana and Idaho (northwestern United States) and southern British...