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Topic: Guadalupian

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Permian

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	Nassir Alnaji Master's Thesis - Permian Basin Geology (Site not responding. Last check: 2007-11-03)
		This chapter is intended as an overview of the general setting of the Permian Basin, focusing on the Guadalupian formations of the Upper Permian and the overlying Ochoan Formation evaporate seals.
		The Guadalupian supersequence was ended by the evaporative drawdown of the Castile and Salado Formations, the subaerial exposure of the shelf and the termination of carbonate deposition.
		It is represented by the deposition of the upper Yates Formation and Tansill Formation on the shelf, the Upper Massive Reef on the shelf edge, the Capitan bedded on the slope, and the continuation of the Bell Canyon in the Delaware Basin.
	strata.geol.sc.edu /Nassir-Thesis-SITE/CHAPT07.html (6656 words)

	Palaeos Paleozoic: Permian: The Guadalupian sub-period
		The Guadalupian stage is named after the Guadalupe Mountains of New Mexico, U.S.A., where rocks and fossils of this age are known.
		These rock strata and fossils were formed during the middle Permian period, and as part of the recent revision of Permian stratigraphy (in order to attain a standard global correlation) the old division of lower and upper Permian has been supplemented, if not replaced, by a newer arrangement.
		In this the Guadalupian epoch or sub-period refers to the early part of the Upper or Late Permian (with the Lopingian as the latest Late Permian).
	www.palaeos.com /Paleozoic/Permian/Guadalupian.html (714 words)

	Silicification (Site not responding. Last check: 2007-11-03)
		This thin section photomicrograph is from the Permian (Guadalupian) Tosi Chert of the Park City Formation at South Fork of Owl Creek, Wyoming (near Anchor Dam), west of Thermopolis, Wyoming.
		This photograph of a silicified evaporite nodule is from the Permian (Guadalupian) Tosi Chert of the Park City Formation at South Fork of Owl Creek, Wyoming (near Anchor Dam), west of Thermopolis, Wyoming.
		This photograph of a polished slab is from the Permian (Guadalupian) Tosi Chert of the Park City Formation at South Fork of Owl Creek, Wyoming (near Anchor Dam), west of Thermopolis, Wyoming.
	www.ees.nmt.edu /Geol/classes/geol524/Diag/Silicif.html (949 words)

	Headlines@Hopkins: Johns Hopkins University News Releases
		Their extinction pattern shows that all of the largest genera (groups of species) of fusulinaceans, those longer than about six millimeters, were killed during the Guadalupian interval.
		The Guadalupian interval would have been recognized by geologists as a major period of mass extinction if not for the overshadowing period five million years later, Dr. Stanley said.
		Of the 59 genera of fusulinaceans that existed at the Guadalupian stage, 45 were killed, leaving only 14 surviving.
	www.jhu.edu /news_info/news/home94/nov94/extinc.html (790 words)

	Glass Mountains, Texas
		The Glass Mountains themselves have been chosen as the standard section for the Permian period because of the presence of a continuous layer of Permian sediment 1500 to 2000 m thick.
		The layers of the Permian in the area, as first proposed in 1939, are the Wolfcampian, the Leonardian, the Guadalupian, and the Ochoan, named for various local features (the first two are named for Wolf Camp, a town in the Glass Mountains, and Leonard Mountain, also in that mountain range).
		The Guadalupian series includes two zones based on a sharp change of fusulinid genera, from Parafusulina to Polydiexodina.
	www.ucmp.berkeley.edu /permian/glassmts.html (1401 words)

	The Permian Reef Complex (Delaware Basin) of West Texas-slide 9 (Site not responding. Last check: 2007-11-03)
		The unconformity separates the lower, Leonardian Stage sediments from the sediments of the younger, Guadalupian Stage.
		Limestone conglomerates of the Cutoff Formation, and sands of the Brushy Mountain Formation and the Cherry Canyon tongue onlap this unconformity (a Type 1 sequence boundary).
		During the Early Guadalupian Age, the Artesia Group and the Goat Seep Dolomite were deposited.
	www.eos.ubc.ca /public/resources/slidesets/guad/slidefiles/guadc8.html (223 words)

	Palaeos Paleozoic: Permian: The Lopingian Epoch
		The Lopingian stage constitutes the later subdivision of the Late Permian, which follows immediately from the Guadalupian.
		As part of the current revision of Permian stratigraphy, "Lopingian" and "Guadalupian" have replaced earlier terms like "Upper Permian", "Zechstein", "Tartarian", and "Dzulfinan" in international usage (although the latter three terms are still applied locally).
		This was a period of great stress for eco-systems, as the climate continued to dry and the single large continent of Pangea did not provide much room for diversity (the more isolated islands and continents, the more species).
	www.palaeos.com /Paleozoic/Permian/Lopingian.html (562 words)

	Dolomite (Site not responding. Last check: 2007-11-03)
		This thin section photomicrograph (plane-polarized light; unstained section) of dolomitized columnar stromatolites is from the Guadalupian (Permian) Ervay Member, Park City Formation Little Sheep Mountain, north of Greybull, Wyoming.
		The excellent preservation of the primary textures is to to the fine crystal size of the dolomite and probably formed in a sabkha environmnet.
		This poorly stained thin section photomicrograph (plane polarized light) is from a fenestral pore in a dolomitized, peloidal, pisolitic boundstone from the Guadalupian (Permian) Ervay Member, Park City Formation Little Sheep Mountain Anticline, north of Greybull, Wyoming.
	www.ees.nmt.edu /Geol/classes/geol524/Diag/Dolo.html (292 words)

	Johns Hopkins Gazette: September 26, 1994
		Instead, many species were first killed off during a time referred to by geologists as the Guadalupian stage of the Permian period.
		Their extinction pattern shows that all the largest genera, or groups of species, of fusulinaceans, those longer than about 6 millimeters, were killed during the Guadalupian interval.
		By lumping extinctions from both the Guadalupian and the Tatarian intervals together, scientists have overestimated the Tatarian extinction rate, Dr. Stanley said.
	www.jhu.edu /~gazette/1994/sep2694/stanley.html (734 words)

	[No title]
		The Second International Guadalupian Symposium (Guadalupian II), sponsored by the U.S. Geological Survey, Sul Ross State University, and the Subcommission on Permian Stratigraphy (ICS-IUGS) was held in Alpine, Texas, and adjacent field areas April 10-13, 1996.
		Of particular relevance is the proposal "To proceed with all appropriate speed to establish the Guadalupian as the Middle Permian Series": 25 voted in favor, 0 against, and 4 abstained.
		Establishing of Guadalupian series into the Permian have objective basis, because the beginning and the end of Guadalupian are corresponds with great events in Permian history: transgression and regression, - which caused of essential biotic reconstructions.
	pri.boisestate.edu /permophiles/issue29.html (15388 words)

	Palaeos Paleozoic: Permian: The Permian Period
		In the oceans, xenacanth sharks dominated until the Guadalupian, when they were replaced by hybodonts.
		Following this was the Dinocephalian dynasty of the middle Permian (Guadalupian epoch).
		The Dinocephalians all died out suddenly, perhaps as a result of unusual climatic factors, at the end of the Guadalupian.
	www.palaeos.com /Paleozoic/Permian/Permian.htm (1677 words)

	SCHOLARLY PUBLICATIONS: (Site not responding. Last check: 2007-11-03)
		Crow and G. Bell, Jr., (eds.), Guadalupian Deposition in Sabkha, Shelf, Reef, and Basin Environments, Guadalupe Mountains, Texas and New Mexico.
		Grant, and D. Rohr, (eds.), Preliminary Proceedings of the Guadalupian Symposium.
		The poster presentation described in abstract 1998c, explaining the international significance of the Guadalupian stratotype, was transferred to the National Park Service for permanent display in the Visitor's Center, Guadalupe Mountains National Park.
	www.utsa.edu /water/resumes/Lance-Lambert.htm (3240 words)

	Extinctions at the end of the Guadalupian and Permian
		Extinctions at the end of the Guadalupian and Permian
		The two big impacts into the ocean at the ends of the Guadalupian and Permian may have caused the most severe biotic crisis in the history of life on Earth.
		Stanley, S.M. and Yang, X.N. A double mass extinction at the end of the Paleozoic Era.
	www.ugr.es /~mlamolda/congresos/bioeventos/kaiho.html (796 words)

	Guadalupe Mountains, Sequence Stratigraphic Models
		The sequence stratigraphic model presented in the site describes the uppermost Leonardian through Guadalupian stratigraphy of the Guadalupe Mountain region in terms of 2 Leonardian (L7-L8) and 28 Guadalupian high-frequency sequences (HFS), making up six composite sequences (CS 9 through 14).
		The model attempts to accurately depict the main lithofacies assemblages as distributed in each sequence, but it does not differentiate systems tracts within each HFS's.
		References to more detailed local studies are presented throughout both the stratigraphic model discussions and the accompanying photomosaic panels.
	www.beg.utexas.edu /indassoc/rcrl/guadpublic/models.htm (364 words)

	LATEST GUADALUPIAN MICROFAUNAS (CONODONTS, FORAMINIFERS) FROM WEST TEXAS (Site not responding. Last check: 2007-11-03)
		Latest Guadalupian microfaunas in West Texas are represented by the composite Jinogondolella altudaensis conodont zone.
		This zone is restricted to the Reef Trail Member (“post-Lamar”) of the Bell Canyon Formation in the Guadalupe Mountains, the uppermost part of the Altuda Formation in the Glass and Del Norte Mountains, and is reported here from the Lamar Limestone Member of the Bell Canyon Formation in the Apache Mountains.
		These two forms characterize the last Guadalupian fauna and the first Upper Permian fauna in China, respectively, and demonstrate that a complete succession of the Guadalupian is displayed in West Texas.
	gsa.confex.com /gsa/2002SC/finalprogram/abstract_33070.htm (347 words)

	Antarctic Alert - Full Record Display (Site not responding. Last check: 2007-11-03)
		We propose a different tempo and mechanism of extinction because we recognize two separate but geologically abrupt mass extinctions on land, one terminating the Middle Permian (Guadalupian) at 260.4 Ma and a later one ending the Permian Period at 251 Ma.
		Extinctions have long been apparent among marine invertebrates at both the end of the Guadalupian and end of the Permian, which were also times of warm-wet greenhouse climatic transients, marked soil erosion, transition from high- to low-sinuosity and braided streams, soil stagnation in wetlands, and profound negative carbon isotope anomalies.
		Both mass extinctions may have resulted from catastrophic methane outbursts to the atmosphere from coal intruded by feeder dikes to flood basalts, such as the end-Guadalupian Emeishan Basalt and end- Permian Siberian Traps.
	www.coldregions.org /A_A_G017.htm (224 words)

	KGS--Petrography of Upper Permian Rocks--Stratigraphy, Leonardian
		The exposures of Permian rocks in Kansas range in age from lower Wolfcampian to upper Leonardian and possibly Guadalupian.
		Many of the exposures of units which actually are not red are commonly obscured by a red wash so that in general appearance the outcrops are remarkably uniform in color.
		Many formational and member boundaries are marked only by a "bleached" zone or an evaporite unit, although formational units are more or less characterized by finer or coarser particle size, blocky or flaky appearance, slight differences in color, or some other common lithologic feature.
	www.kgs.ku.edu /Publications/Bulletins/111/03_strat.html (11374 words)

	Earth Science World Image Bank (Site not responding. Last check: 2007-11-03)
		Regionally, the top of the Tansill Formation, which is considered to be the top of the Guadalupian stage, is observed as unconformable.
		There is no evidence of long-term exposure in the underlying Tansill carbonates in the form of extensive desiccation features, caliche/soil formation, brecciation, or development of secondary porosity through dissolution.
		C shows basin filling by the Castile evaporites and probable exposure during most of Castile time of the former Guadalupian shelf.
	www.earthscienceworld.org /images/search/results.html?Keyword=Guadalupian (973 words)

	Differentiating Syn (Site not responding. Last check: 2007-11-03)
		Late Guadalupian Bell Canyon slope and basin strata exposed in the Guadalupe Mountains have localized zones of folding related to synsedimentary deformation.
		Because paleoslopes are well constrained by the Capitan shelf margin, strain indicators associated with folding can be related to paleoslope.
		For example, folding in the Castile Formation is a pre-lithification feature and may therefore be Permian in age rather than Laramide.
	www.wtgs.org /pbs-sepm/05_02talk.htm (339 words)

	Yates Formation
		However, in the Delaware Basin, the Bell Canyon was deposited on the basin floor.
		This surface may also have been fairly low relief but was at an elevation of as much as 1,000 ft below sea level at the end of the Guadalupian.
		At present, in the structural center of the Midland Basin, the top of the Yates Formation, lies at 500 ft below sea level.
	www.beg.utexas.edu /environqlty/salt/fig4.htm (362 words)

	Lacustrine Depositional Environments of Guadalupian Source Rocks in the Turpan, Junggar, and Santanghu Basins, ... (Site not responding. Last check: 2007-11-03)
		Lacustrine Depositional Environments of Guadalupian Source Rocks in the Turpan, Junggar, and Santanghu Basins, Northwestern China
		The depositional environments and distribution of Guadalupian lacustrine source rocks in adjacent Turpan, Junggar, and Santanghu basins, NW China, are critical to evaluating the source-rock potential and petroleum systems of these basins.
		The Guadalupian lacustrine shale and torbanite have high hydrocarbon potential of 19.3mg/g and 42.3 mg/g, respectively, suggesting that they are major source rocks in the basins.
	aapg.confex.com /aapg/sl2003/techprogram/paper_73593.htm (309 words)

	William M. Cobb & Associates, Inc. - Edmond G. "Ed" Boutte
		Sarg, J. F., 1977, Sedimentology of the carbonate-evaporite facies transition of the Seven Rivers Formation (Guadalupian, Permian) in Southeast New Mexico; in, Upper Guadalupian Facies, Permian Reef Complex Guadalupe Mountains, New Mexico and West Texas, Field Conference Guidebook, 1977, Permian Basin Section-SEPM, Pub.
		Sarg, J. F., 1981 Petrology of the carbonate – evaporite facies transition of the Seven Rivers Formation (Guadalupian, Permian) Southeast New Mexico: Jour.
		Markello, J. R., and Sarg, J. 1998, Late Permian (Guadalupian) LST/TST mud-rich sponge bioherms: their sequence stratigraphic architecture and occurrence on an over-steepened, gullied ramp-margin; San Andres Fm., Last Chance Canyon, Guadalupe Mountains, New Mexico, USA; IAS Congress, Spain.
	www.wmcobb.com /res/princ_jfs.htm (2089 words)

	Conodont Papers - L
		Precise definition of the Lower/Upper Permian (basal Guadalupian) boundary: Morphometrics of the Mesogondolella-Jinogondolella paedomorphocline, p.
		15-16 in B. Wardlaw and D. Rohr (eds.), Abstracts and Proceedings of the Second International Guadalupian Symposium, Sul Ross State University, Alpine Texas.
		Precise boundary definitions for the Guadalupian Subseries and its component stages: Analyzing the conodont transitional morphoclines, p.
	www.le.ac.uk /geology/map2/pander/pander97/lpapers.html (523 words)

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