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Published by way of the yankee Geophysical Union as a part of the Field journey Guidebooks Series.

box journey T125 of the twenty eighth overseas Geological Congress will supply individuals a nearby evaluation of the geology of the Basin and diversity province and an creation to Cambrian and Early Ordovician stratigraphy and paleontology. Emphasis might be put on local stratigraphy, depositional environments, biofacies and lithofacies kin, biostratigraphy, trilobite mass extinctions ("biomere boundaries"), proof for eustatic sea-level adjustments, paleotectonic historical past, and paleogeographic reconstructions. A transect can be made throughout a past due Cambrian and Early Ordovician passive continental margin from deep-water-carbonate submarine-fan and slope facies in important Nevada to temporally an identical shallow-water microbial bioherms, and carbonate sand and dirt facies in japanese Nevada.

Chapter 2 Geology of the Basin and variety Province, Western usa: an summary (pages 6–13): Harry E. Cook
Chapter three Day zero: Early and center Cambrian Stratigraphy of Frenchman Mountain, Nevada (pages 14–16): A. R. Palmer
Chapter four Day 1: Early Cambrian Stratigraphy and Paleontology, Southern nice Basin, California?Nevada (pages 17–27): A. R. Palmer and Stephen M. Rowland
Chapter five Day 2: past due Cambrian and Early Ordovician Stratigraphy, Biostratigraphy and Depositional Environments, sizzling Creek diversity, Nevada (pages 28–36): Harry E. cook dinner, Michael E. Taylor and James F. Miller
Chapter 6 Day three: overdue Cambrian and Early Ordovician Biostratigraphy and Depositional Environments of the Whipple Cave Formation and residence Limestone, significant Egan variety, Nevada (pages 37–44): Michael E. Taylor, Harry E. prepare dinner and James F. Miller
Chapter 7 Day four: overdue Cambrian and Early Ordovician Stratigraphy and Biostratigraphy, Southern condominium variety (“Ibex Area”), Utah (pages 45–58): James F. Miller and Michael E. Taylor
Chapter eight Days five and six: Cambrian Stratigraphy and Paleontology of the valuable condo variety and Drum Mountains, Utah (pages 59–72): Margaret N. Rees and Richard A. Robison
Chapter nine a realistic box consultant for comparing Early Paleozoic Ichnofabric (pages 73–86): Mary L. Droser and David J. Bottjer

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Additional info for Cambrian and Early Ordovician Stratigraphy and Paleontology of the Basin and Range Province, Western United States: Las Vegas, Nevada to Salt Lake City, Utah, July 1-7, 1989

Example text

C o o k , and J a m e s F. Miller 1 2 3 U . S . Geological Survey, Denver, Colorado U . S . Geological Survey, Menlo Park, California Southwest Missouri State University, Springfield, Missouri 1 2 3 INTRODUCTION Today we will examine the Whipple Cave F o r m a t i o n and H o u s e Limestone, the shoal-water equivalents of s o m e of the deep-water facies (Hales Limestone) w e saw on Day 2 in the H o t Creek Range, about 140 k m t o t h e southwest. W h e r e a s the rocks in the H o t C r e e k R a n g e formed in deep marine basin-plain, base-ofslope, and slope environments on t h e oceanward side of a distally steepened r a m p , the coeval carbonate strata in t h e Egan Range w e r e deposited in shallow subtidal, intertidal, and supratidal settings of the r a m p .

S. 95 assuming a speed of about 100 km per hour. F o r the first 40-45 minutes, the highway follows the Las Vegas Valley, which is the site of the major rightlateral strike-slip Las Vegas fault zone of late Tertiary age. Oroclinal deflection of regional strikes by t h e rightlateral stresses is beautifully developed in the mountains to the north and south. Directly ahead, during the first 5-10 minutes of this segment of the trip, the eastern end of the Spring Mountains is excellently illuminated in t h e morning light.

M o r e detailed work is needed in coeval shoal-water sites to t h e east to fully evaluate t h e presence and magnitude of this inferred earlier eustatic event. S. 6, then drive easterly across H o t Creek Valley, the Pancake Range, Railroad Valley, and through Currant Pass between t h e White Pine Range and H o r s e Mountains of the G r a n t Range. STOP 23 (OPTIONAL): CURRANT CANYON, HORSE MOUNTAINS-WHITE PINE RANGE: OVERVIEW OF LOWER PALEOZOIC STRATIGRAPHIC SECTION O n t h e north side of Currant Canyon, t h e cliffforming Middle Cambrian Pole Canyon Limestone overlies a thinly bedded unit that is correlative with t h e C a r r a r a Formation (observed on Day 1) and contains Albertella and Ogygopsh.

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