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Topic: Sequence stratigraphy

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	LITHOSTRATIGRAPHY AND SEQUENCE STRATIGRAPHY
		The age of 16.9 Ma at 465.1 ft (141.76 m) is consistent with the interpretation of a sequence boundary 465 ft (141.73 m), although an age of 16.4 Ma at 475 ft (144.78 m) is consistent with 477.1 ft (145.42 m) as a sequence boundary.
		We interpret this surface as a sequence boundary and the underling glauconitic quartz sand as the HST of the underlying sequence (Fig.
		Benthic foraminifers in the sequence between 1517 and 1559 ft (462.38 and 475.18 m) are predominantly of biofacies G of Browning et al.
	www-odp.tamu.edu /publications/174AXSIR/chap_02/c2_5.htm (9056 words)

	Sequence stratigraphy page 1
		The elements of "sequence stratigraphy" had been around long before it acquired its modern name, and those elements had their own terminology, familiar to most geologists and geophysicists (depositional cycles, unconformities, beds and bed sets, laminae and laminae sets, etc.).
		Sequence stratigraphy may be applied at several scales, and in this sense it is fractal in nature (meaning that at any scale sequences have the same characteristics).
		Sequences are controlled by changes in relative sea level, and as they are bounded top and bottom by unconformities, they necessarily begin with a lowstand of sea level.
	www.aseg.org.au /publications/articles/mul/ss1.htm (2210 words)

	CRSQ Abstracts, Volume 34, Number 1
		The secular questioning of the quietism of Lyell, Darwin, and modern geology in general is responsible for the revolution in stratigraphy and sedimentology begun in 1977.
		Sequence stratigraphy (the classical Exxon approach) is compatible with creationist Flood geology.
		Sequence stratigraphy is a threat to traditional uniformitarian formation-scale or the grain-by-grain building-up and tearing-down of the land.
	www.creationresearch.org /crsq/abstracts/sum34_1.html (645 words)

	Sequence Stratigraphy Introduction and Overview
		Sequence Stratigraphy, in contrast, is an allostratigraphic model that is used to interpret the depositional origin of these sedimentary strata and assumes, though this is not always stated, an implicit connection to base level change.
		The various forms of sequence stratigraphic analyses outlined include the use of seismic cross-sections, well logs and outcrop studies of sedimentary rocks to infer changes of relative sea level and rates of sedimentation.
		Later in the section on the Basics of Sequence Stratigraphy you will be introduced to the details of how system tracts respond to changing base level.
	strata.geol.sc.edu /seqstrat.html (782 words)

	Stratigraphy
		Sequence stratigraphy has enabled us to better understand the Cenozoic deposits of southwestern Montana and how they reflect the geologic history of this area.
		Sequence boundary delineation is further enhanced by reflection termination patterns, similar to those found in marine strata.
		Sequence age calibration is based upon vertebrate fossil and radiometric age data.
	www.earthmaps.com /strat.htm (659 words)

	Harry E. Wheeler and the Development of Sequence Stratigraphy (Site not responding. Last check: 2007-10-11)
		Harry E. Wheeler, who served as UW geology professor from 1948 to 1976, was "the chief theoretical architect of sequence stratigraphy, the foremost concept now used by all petroleum and many mining companies to explore for oil, gas, and mineral deposits," notes UW geologist Eric Cheney.
		Stratigraphy refers to the study of layers of sedimentary and volcanic rocks.
		Professor L. Sloss of Northwestern University and his coworkers were the actual discoverers of sequence stratigraphy in the late 1940s in the area of Dillon, Montana, but Sloss credits Wheeler with establishing the theoretical framework for studying stratigraphy and for recognizing the meaning and importance of unconformities in the geologic record.
	www.washington.edu /research/pathbreakers/1950c.html (513 words)

	Solutions From The Field - Petroleum Systems of the Michigan Basin - A Look at Remaining and Undiscovered Oil and Gas ... (Site not responding. Last check: 2007-10-11)
		Sequence stratigraphy has evolved from an academic concept to a valuable tool for oil and gas exploration in the past two decades, but it is still under-utilized.
		Sequence stratigraphy concepts were developed for marine deposits and application of them to non-marine stratigraphy presents difficulties in interpretation.
		Sequence stratigraphy can be a valuable tool for evaluation of nearshore sediments and prediction of drilling locations in hydrocarbon exploration.
	www.pttc.org /solutions/sol_2005/541.htm (2197 words)

	Stratigraphy Summary
		In addition, stratigraphy has been broadly used by some geologists who study mountain building and plate tectonics to mean the study of order of emplacement of rock units of various types, including igneous and metamorphic rocks, to which the law of superposition does not apply.
		Sequence stratigraphy, which holds that large bodies of sedimentary strata are bounded by interregional unconformities, formed as a result of global eustatsy.
		Sequence stratigraphy and global sea-level cycle charts are concepts used today major petroleum-company exploration laboratories all over the world.
	www.bookrags.com /Stratigraphy (3266 words)

	Sequence Stratigraphy
		Investigating sequence stratigraphy in a rock outcrop can be an exciting hands-on exercise.
		Even in the absence of a good sequence of rocks to observe, sequence stratigraphy exercises can still be applied.
		Sequence Stratigraphy of Foreland Basin Deposits - Outcrop and Subsurface Examples from the Cretaceous of North America: American Association of Petroleum Geologists Memoir 64: 137-223.
	www.chronos.org /education/sequence-stratigraphy2.html (724 words)

	GSC Calgary - Sequence stratigraphy
		Sequence stratigraphy is the study of rock relationships within time-equivalent depositional successions bounded by surfaces of erosion or nondeposition.
		Sequence stratigraphy can be used as a lithological predictor and as a tool for unraveling basin-fill history.
		High resolution sequence stratigraphy is useful in petroleum reservoir correlation and modelling.
	gsc.nrcan.gc.ca /org/calgary/research/sequence_e.php (102 words)

	Stratigraphy - Wikipedia, the free encyclopedia
		Stratigraphy includes two related subfields: lithologic or lithostratigraphy and biologic stratigraphy or biostratigraphy.
		Another influential application of stratigraphy in the early 1800's was a study by Georges Cuvier and Alexandre Brongniart of the geology of the region arround Paris.
		Biostratigraphy or paleontologic stratigraphy is based on fossil evidence in the rock layers.
	en.wikipedia.org /wiki/Stratigraphy (1649 words)

	PetroSkills, LLC >> A World Leader in Petroleum Training (Site not responding. Last check: 2007-10-11)
		Sequence stratigraphy, based on sedimentary response to changes in relative sea level gives the explorationist and the development geoscientist a powerful new predictive tool for regional basin analysis, shelf to basin correlation and reservoir heterogeneity.
		Perhaps most importantly, sequence stratigraphy gives the geoscientist a superior framework for the integration of geologic, geophysical and engineering data and expertise.
		We will develop the basic concepts of sequence stratigraphy such as the integration of eustasy and tectonic subsidence which gives rise to the basic cycle hierarchy that can be observed in the geologic record.
	www.ogci.com /course_info.asp?courseID=280 (687 words)

	Magnetic Susceptibility, Biostratigraphy, and Sequence Stratigraphy: Insights into Timing of Devonian Carbonate ...
		We have further documented additional depositional sequences, enhanced our understanding of the biostratigrpahy that is crucial for correlation regionally and globally and are now collecting data on magnetic susceptibility of slope and basin sediments to further improve correlations.
		Sequence 7 correlates with IId-1 and spans MN 11-12.
		Sequence 8 correlates with MN IId-2 and was deposited during MN 13.
	www.searchanddiscovery.com /documents/2005/whalen/index.htm (1200 words)

	Nearctica - Geology - Stratigraphy
		Stratigraphy can be used to infer past environments of the earth based on the physical characteristics of the rocks and the changes in environment that occurred over time.
		Stratigraphy has great economic importance by providing time markers in the geological record and is used in oil exploration, mining, and hydrology.
		Stratigraphy is often closely linked with Paleontology because of the use of fossils, in many cases, to identify and age particular strata.
	www.nearctica.com /geology/strata.htm (438 words)

	SOFIA - SEQUENCE STRATIGRAPHY... - Peace River Formation: Sequence Stratigraphy
		In developing a regional sequence stratigraphy, it is common practice to initially identify the more easily recognized condensed sections of unconformity-bound depositional sequences (Posamentier and James, 1993).
		In the proposed southern Florida sequence stratigraphy for this study, downdip portions of some sequence boundaries are equivalent to the parasequence concept of shoaling-upward cycles bounded by flooding surfaces (Van Wagoner et al., 1988) instead of unconformities.
		Depositional sequence 1 (DS1) is a wedge-shaped deposit of quartz sand, sandstone, and minor carbonate that thins toward the southern and eastern edges of the Florida peninsula.
	sofia.usgs.gov /publications/papers/fgssp49/seqstrat.html (1208 words)

	SEQUENCE STRATIGRAPHY IN THE CHATTANOOGA SHALE (Site not responding. Last check: 2007-10-11)
		It is a distal equivalent to the almost 3000m thick Catskill sequence, and encompasses most of the Frasnian and Fammenian, approximately 14 million years of earth history.
		Sequence developement reflects the combined influences of sea level variations and the topography of the Nashville Dome.
		Geometry of "sequence slices" is likely to change as more data (conodont work) become available, the overall stratigraphic subdivision, however, is likely to remain the same.
	www.uta.edu /paleomap/homepage/Schieberweb/sequencestrat.htm (482 words)

	Charlie Kerans: The Evolving Role of Sequence Stratigraphy in Carbonate Reservoir Characterization
		The advent of carbonate sequence stratigraphy has played a major role in the development of modern high-resolution stratigraphic frameworks to be used as a front end for reservoir characterization and simulation.
		When seismic stratigraphy and later sequence stratigraphic concepts were introduced in the 70's and early 80's, the emphasis for this interpretation methodology was as an exploration tool for evaluation of frontier basins.
		It was this predictive sequence model that through the 80's and 90's was run through the ringer using subsurface core, well and seismic data as well as detailed and regional outcrop studies and found to be a revolutionary tool.
	www.beg.utexas.edu /news-events/news-archive/Kerans-03-06-02.htm (445 words)

	An Online Guide to Sequence Stratigraphy
		Because of the extreme difficulty in teasing apart the effects of tectonic subsidence and eustatic sea level in regional or local studies, sequence stratigraphy now generally emphasizes relative changes in sea level, as opposed to its earlier emphasis on eustatic sea level.
		In depositionally updip areas, the transgressive surface is commonly merged with the sequence boundary, with all of the time represented by the missing lowstand systems tract contained within the unconformity.
		Type 2 sequence boundaries lack subaerial erosion associated with the downcutting of streams and lack a basinward shift in facies.
	www.uga.edu /~strata/sequence/glossary.html (1632 words)

	Microstratigraphy
		Stratigraphy has always been an essential part of the geological studies for the various Channel Tunnel attempts, the aim being to divide the rock mass into layers of rock, each layer being deposited during the same time period.
		These sections allowed the detailed stratigraphy of the Chalk Marl at this location to be studied for the first time, and a correlation established between Abbot's Cliff and the foreshore sections in East Wear Bay (Gale, 1989).
		The use of this zonal boundary was therefore dropped by TML in favour of the recognition of the datums M3 and M4.
	www.geologyshop.co.uk /microfos.htm (9992 words)

	Fact Sheet, Sequence Stratigraphy, GEUS
		Sequence stratigraphy integrates seismic and log-stratigraphy, biostratigraphy, sedimentology and geochemistry to tackle the geological problems encountered in these fields.
		In hydrocarbon exploration a regional sequence stratigraphic framework helps the geologist to predict the distribution of reservoirs, source rocks, and seals.
		In production studies, sequence stratigraphy can be applied to improve the understanding of the reservoir interval, with a view to enhanced hydrocarbon recovery.
	www.geus.dk /geus-general/fact-sheets/fs-sequence-strat-uk.htm (267 words)

	Untitled Document
		Sequence Stratigraphy - the study of the effects of regional or global changes in sea level on the sedimentary rock record.
		Although tectonic movement and shifting sedimentation played a role, the primary control on sequences was changes of sea level probably induced by glacial cycles in the southern hemisphere.
		A sequence stratigraphic analysis shows that the sandstones that characterize the Aux Vases in southwestern Illinois were originally part of a marine estuary and that the thinner bedded sandstones in the eastern part of the state were deposited in a tidal flat.
	www.isgs.uiuc.edu /sedcrust/tsequence.html (310 words)

	Teaching Documents about Stratigraphy and Historical Geology, Links for Palaeobotanists
		Sequence Stratigraphy and Facies of the European Keuper@
		Carlton E. Brett, Department of Earth and Environmental Sciences, University of Rochester: Sequence Stratigraphy, Paleoecology, and Evolution: Biotic Clues and Responses to Sea-Level Fluctuations.
		Sequence stratigraphy links to introductory materials on the basics of sequence stratigraphy, chronostratigraphy, seismic sequence stratigraphy, and well log interpretation.
	www.biologie.uni-hamburg.de /b-online/palbot/teach/stratiteach.html (1091 words)

	Sequence stratigraphy of a Tertiary coal bearing strata from Svalbard
		Sequence stratigraphy of a Tertiary coal bearing strata from Svalbard
		Similarly, falls in relative sea-level which represent sequence boundaries may also be traced into the mire and recorded by changes within the coal.
		Identifying high-resolution accommodation trends within packages of coal constrained by such surfaces will enable sequence stratigraphic interpretations of the equivalent shallow-marine strata to be refined.
	www.uib.no /cipr/research/SequenceStratigraphySvalbard.htm (209 words)

	Paleontology and Sequence Stratigraphy of the Upper Cretaceous Navesink Formation, New Jersey (Site not responding. Last check: 2007-10-11)
		These sequences of marine sediments were deposited during cycles of sea level rise and fall (transgression and regression) and are separated from each other by disconformity surfaces representing intervals during which the coastal plain was exposed and eroding.
		Sequence stratigraphy is a method for understanding the formation of sedimentary strata within the context of cycles of relative sea level rise (transgression) and fall (regression).
		Above the sequence boundary, marine deposits of the TST are often thin due to sediment starvation as clastic sediments become trapped in flood plains and estuaries flooded during the time of maximum rate of rising sea level.
	pbisotopes.ess.sunysb.edu /lig/Field_Trips/guide-10-03.htm (3209 words)

	Nonmarine Sequence Stratigraphy: Updip Expression of Sequence Boundaries and Systems Tracts in a High-Resolution ...
		His research focuses on sedimentology and application of sequence stratigraphic concepts to nonmarine deposits, with particular interest in the Permian and Triassic red beds of the Paraná basin, Brazil.
		sequence is characterized by shoreline backstep of 80-150 km.
		sequence and is capped by the sequence boundary.
	aapgbull.geoscienceworld.org /cgi/content/abstract/85/11/1967 (818 words)

	Sequence Stratigraphy - Training and Consulting (Site not responding. Last check: 2007-10-11)
		This seminar explores the historical development of the two major carbonate sequence stratigraphic approaches, discusses their models and inherent limitations, and reviews petroleum case studies showing which approach is most effective.
		The age of a particular sequence, inferred sea level changes, and seismic geometries, are key elements of this approach and define various systems tracts (lowstand, transgressive, early and late highstand).
		In order to discuss and contrast the two sequence stratigraphic approaches, basic and established relationships in carbonate geology are presented during the first part of this seminar.
	www.dravisinterests.com /seqstrat.html (855 words)

	Publisher description for Library of Congress control number 2006042525
		Even though widely popular among all groups interested in the analysis of sedimentary basin fills, both in academia and in the industry, sequence stratigraphy is yet a difficult undertaking due to an overwhelming jargon and the persistence of conflicting approaches as to how the sequence stratigraphic method should be applied to the rock record.
		This textbook examines the relationship between such conflicting approaches from the perspective of a unifying platform, demonstrating that sufficient common ground exists to eliminate terminology barriers and to facilitate communication between all practitioners of sequence stratigraphy.
		Sequence stratigraphy remains the most recent paradigm in the broad field of sedimentary geology, with tremendous potential to deciphering the record of global change and to improving the success of economic exploration.
	www.loc.gov /catdir/enhancements/fy0629/2006042525-d.html (258 words)

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