... in the Medicine Bow Mts. Detailed study of Coad Mountain suggests that basement folding under relatively low load pressures might take place through passive folding along microfractures parallel to joints when the basement is once again placed in a stress field. The folding mechanism by which sedimentary veneer...

... of metasediments occurring in the Precambrian complex of the Medicine Bow Mts. It is believed to be not less than 1.7 b.y. old. Field studies support the conclusion that the stromatolites and bioherms are organo-sedimentary features. GeoRef, Copyright 2004, American Geological Institute. Reference includes data...

.... MR, North Madison Range; S. MR, and South Madison Range. Sierra Madre (SM), Medicine Bow Mountains (MB), and Hartville Uplift (HU) are in southeastern Wyoming. Locations of high precision U–Pb dates are indicated by circles and keyed to Table  1 . ...

... orogen internides in the area east of the Hartville uplift and overrides the orogen in the Medicine Bow Mountains and Sierra Madre. The location of the Cheyenne belt west of the Medicine Bow Mountains is uncertain. In this report, we discuss the Proterozoic evolution of the Colorado province...

... compositional and structural anisotropies that influenced later deformation and magmatism, such as the generation and emplacement of the 1.43-Ga Laramie anorthosite complex and location of Paleozoic diamond-bearing diatremes. In this paper, the term “Medicine Bow orogeny” is proposed to describe the ca. 1.78-Ga...

... of the Rocky Mountains experiment). 40 Ar/ 39 Ar and U-Pb data define age patterns in the Sierra Madre that are delineated by discrete structures. North of the 1.78-Ga Divide Peak mylonite zone, a foreland structure associated with the Medicine Bow orogeny, 40 Ar/ 39 Ar biotite dates suggest cooling below 300...

..., and deformation mechanism analyses of the northern mylonite zone of the eastern Medicine Bow Mountains. Mylonites of this zone record a complex deformation history, but the main deformation phase was sinistral/northwest-side-up oblique transpression. Evidence for southeast-side-up, dip-slip motion...

..., the second base camp was on Sunset Pass between Mt. Coleman and Mt. Wilson, and the third was located on the Maligne River just above Medicine Lake. Work on Devonian rocks was undertaken because of the need for specific information concerning Devonian rocks since the Leduc and Redwater oil fields...

...-directed contractional deformation during the 1.78–1.74-Ga Medicine Bow orogeny. e-mail: [email protected] 22 09 2005 29 03 2006 © 2006 by The University of Chicago. All rights reserved. 2006 The University of Chicago The goal of this article, therefore, is to begin to attack...

... the Archean Wyoming province and Proterozoic Colorado province. The time of emplacement of the Horse Creek anorthosite complex coincides with late stages of the Medicine Bow orogeny, in which Proterozoic island arcs collided with the Wyoming province. The Horse Creek anorthosite complex was emplaced in a zone...

.... Seismol. Soc. Am. 82 , 1453 - 1474 . Chamberlain K. ( 1998 ). Medicine Bow orogeny: Timing of deformation and model of crustal structure produced during continent-arc collision, ca. 1.78 Ga, southeastern Wyoming , Rocky Mt. Geol. 33 , 259 - 277 . Chamberlain K. R. Patel S...

... but southern extremes of Carbon Basin. Map is bounded to east by western parts of Flat Top and Big Medicine Bow anticlines, to north by course of Medicine Bow River, and to south by U.S. Interstate Highway 80 at southern extreme of Simpson Ridge Anticline. Colored map at full 1:24,000 scale is presented...

... orogens and Precambrian provinces from Foster et al. ( 2006 ) and Chamberlain et al. ( 2003 ). The only boundary of the province that is exposed lies in the Sierra Madre and Medicine Bow Mountains, where Proterozoic rocks are juxtaposed against the Wyoming Province along the Cheyenne belt. The Montana...

... axis shows elevation for each lake versus the lake-water δD value. Samples from additional years and seasons in (F) the Park Range of Colorado (CO) and Medicine Bows Mountains of Wyoming (WY) and (H) Union and Togwotee Pass, Wyoming are shown in different colors. Abbreviations: ID—Idaho; MT—Montana; NM...

... was in agriculture and medicine ( Braslavsky, 1943 ). During this period the asphalt acquired the name “Bitumen of Judea,” and Jews from Alexandria were very involved in its trade in the early Middle Ages. During the period of the Crusades, asphalt was mentioned by the crusader monk Burchard of Mt. Sion (1280...

... of the Medicine Hat block, as determined by this study. BBMZ—Beartooth-Bighorns magmatic zone; MMT—Montana metasedimentary terrane; SAT—southern accreted terranes. Inset shows study area in relation to the extent of Laurentia (Archean in gray, Proterozoic in purple). GC—Grouse Creek block; HC—Hearne craton; MT...

... study of ultramafic xenoliths from the northwestern Wyoming Craton . Earth Planet. Sci. Lett. 126 : 457 – 472 . Chamberlain , K. R. 1998 . Medicine Bow Orogeny; timing of deformation and model of crustal structure produced during continent-arc collision, ca. 1.78 Ga, southeastern Wyoming...