...E. W PEIKERT Abstract Pronounced relief of the exposed surface of the Glen Alpine stock offers an opportunity for study of three-dimensional mineralogical variation in a granitic pluton. Polynomial surfaces fitted by least-squares methods to modal data from this stock indicate that, near the center...

.... Whitten and Boyer (1964) studied the process response models based on heavy mineral content whereas Piekert (1962) studied the specific gravity variation in the Glen Alpine stock. In the present case, specific gravity, which is an index of crystallization, being lower for acidic rocks than...

... in the Glen Alpine stock, Sierra Nevada, California : Geol. Soc. America Bull. , v. 73 , p. 1437 - 1442 . Peikert , E. W. , 1963 , IBM 7090 program for least-squares analysis of three-dimensional geological and geophysical observations : U. S. Office Naval Research Geography Branch Tech. Rept...

... Alters-werten und alpiner Verjungung der Biotite Eclog geol Helv 1965 58 369 90 Berger G. 39 Ar/ 40 Ar step heating of thermally overprinted biotites, hornblendes and potassium feld-spars from Eldora, Colorado Earth planet Sci Lett 1975 26 387 408 Berger G. York D...

... coincides with the mapped trace of the subvertical Sronlairig Fault, a feature related in part to the Great Glen and Ericht–Laidon faults, which had been interpreted to result from brittle deformation during the Caledonian orogeny ( c. 420–390 Ma). Exposure of this mica-rich gouge represented an exceptional...

...Miriam Dühnforth; Robert S. Anderson; Dylan Ward; Greg M. Stock Abstract The importance of rock type and tectonic history on rates of glacial erosion, and the relative roles of glacial quarrying and abrasion, are poorly understood. We use concentrations of cosmogenic 10 Be in glacial polish...

... effective stress is high (low P w ) and when cavities are large. Rate of decline of cavity area is where A and n are the flow law parameter and flow exponent in Glen’s flow law, respectively (e.g., Rothlisberger, 1972 ). The history of cavity area is obtained by forward integration of opening...

...Shaun E. Cordes; Greg M. Stock; Brandon E. Schwab; Allen F. Glazner Abstract Large boulders exceeding 10 m 3 in exposed volume are widely scattered throughout Upper Pines Campground in eastern Yosemite Valley, Yosemite National Park, California. These enigmatic boulders rest up to 330 m from...

... to be largely of Glen Rose age and possibly in part Fredericksburg. 13 The Morita formation is to be correlated at least in part with the Las Vigas and Torcer formations of western Texas and northern Mexico. These occurrences of the Neocomian and Comanche sediments in northern Sonora extend the known...

...-Wenlock/pre-Early Devonian folding event, now recognized as being Scandian (Leake, in press). The Garabal, Tyndrum, Ericht–Laidon and Etive–Laggan faults ( Fig. 3 ) are broadly parallel to the Great Glen Fault and were probably contemporaneous with it for part of the period between 428...

... −1.43 Peabody River  Stock Granite:   1 1 m 751.98 335.78 18,859.87 .05658 .41778 .05355 8.0542 25.080 354.79 354.46 352.34 −.71   2 1 m 804.00 393.97 22,155.86 .05674 .41960 .05364 8.9121 27.557 355.76 355.77 355.80 −.01...

... in the central sectors of the Tethyan (Alpine–Himalayan) orogenic belt. This pluton is formed by intrusion at different times of two main magmatic cycles. The older (Cycle 1) is formed by calc-alkaline silicic rocks, which range in composition from diorites to granodiorites and biotite granites, with abundant...

... and plate tectonics 26 th Int. Cong. ,Sec 1972 3 106 12 Dewey J. F. Pitman W. C. Ryan W. B. F. Bonin J. Plate tectonics and the Alpine system Bull. Geol. Soc. Am 1973 84 3137 80 Falcon N. C. The geology of the north-east margin of the Arabian basement shield...

... winds at ground level to the relatively cool Andes. Thus, the rugged, but less severely shortened, lower-elevation fjordland terrane receives ∼2–4 m of annual precipitation, producing ice caps and glaciated valleys ( Montgomery et al., 2001 ); this alpine landscape surmounts a continental crust only ∼35...

...Rodney Arthur Savidge Between the Klondike Plateau and Yukon–Tanana highlands of Yukon and Alaska, respectively, current maps explain glaciated alpine locales and periglacial areas in terms of localized Pliocene–Pleistocene montane ice caps, alpine glaciers, and periglacial changes. However...

..., Western Australia— J.R. McIntyre and J.E. Martyn 975 Geochemical discrimination of tectonic setting for Devonian basalts of the Yarrol province of the New England orogen, central coastal Queensland: An empirical approach— C.G. Murray and P.R. Blake 993 Discussion of: Glen, R.A., Stewart, I.R...

... on reflection seismology ( Brocher et al., 2004 ) and gravity ( Morin and Glen, 2003 ) observations from the Trans-Alaska Crustal Transect (TACT line shown in Fig. 3 ). Although the base of the lower member is not exposed, it likely unconformably overlays Paleozoic–Cenozoic strata equivalent to those exposed...

.... Harley 57 Reconciling heterogeneity in crystal zoning data: An application of shared characteristic diagrams at Chaos Crags, Lassen volcanic center, California —Glen S. Wallace and George W. Bergantz 98 Fe 3+ reduction during biotite melting in graphitic metapelites: Another origin of CO 2...

.... Offler, R.A. Glen, H. Hyodo, and Z. Jiang 819 The Narooma Terrane: Implications for the construction of the outboard part of the Lachlan orogen —R.A. Glen, I.R. Stewart, and I.G. Percival 859 SHRIMP UPb detrital zircon ages from Proterozoic and Early Palaeozoic sandstones and their bearing...