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Topic: Turonian

In the News (Mon 28 Dec 09)

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	Base of Turonian Stratotype (Site not responding. Last check: 2007-11-07)
		The GSSP coincides with the first occurrence of the ammonite Watinoceras devonense, is in the middle of a global positive excursion in carbon 13 isotopes, and is bracketed by widespread bentonites that have yielded age of 93 to 93.5 Ma.
		The Cenomanian - Turonian Boundary lies in the Bridge Creek Limestone Member of the Greenhorn Limestone Formation.
		Kennedy, W. J., Walaszcyk, I., and Cobban, W. The Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous: Pueblo, Colorado, U.S.A. Episodes 28/2, p.
	www.stratigraphy.org /turonian.htm (221 words)

	Turonian Stage, Cretaceous Period in Hampshire - Hampshire Museums Service (Site not responding. Last check: 2007-11-07)
		The Turonian stage was deposited between 90.4 and 88.5 million years ago.
		In Hampshire and the Isle of Wight the Turonian stage is represented by approximately 59 metres of soft limestone/chalk and subordinate marls.
		The Turonian stage, formerly referred to as the Middle chalk, is now included in the White Chalk formation.
	www.hants.gov.uk /museum/geology/periods/turonian.html (177 words)

	Working Group of Palaeontology
		Palaeobiogeographic affinities of the upper Cenomanian–lower Turonian (Cretaceous) bivalve fauna of the Sergipe Basin, northeastern Brazil.
		Palaeobiogeography of the upper Cenomanian–lower Turonian macroinvertebrates of the Sergipe Basin.
		Palaeobiogeographic affinities of the Cenomanian–lower Turonian (Upper Cretaceous) oyster fauna of the Sergipe Basin, north-eastern Brazil.
	www.uni-heidelberg.de /institute/fak12/geol/pal/jens.htm (709 words)

	Gorden L. Bell Jr. (Site not responding. Last check: 2007-11-07)
		Foraminiferal correlations suggest that the oldest material may be Early Turonian age but inoceramid correlations suggest a slightly younger age.
		By these criteria, the Lower Turonian may be as much as 15 meters (4X) thicker than indicated by foraminiferans.
		The oldest (Turonian) mosasaurs from Kansas: Journal of Paleontology, v.
	www2.nature.nps.gov /geology/paleontology/pub/grd2/gsa07.htm (3042 words)

	cicimurri (Site not responding. Last check: 2007-11-07)
		In the northern Black Hills the basal bed of the formation is in the Dunveganoceras pondi Biozone that is early late Cenomaniain in age, whereas the uppermost beds are in the Collignoniceras woollgari Biozone of early middle Turonian age (Obradovich 1993).
		In the southern Black Hills the basal portion of the OLM is found in the Pleisiacanthoceras wyomingense Biozone, indicating a late middle Cenomanian age (Obradovich 1993).
		Selachians from the Carlile Shale (Turonian) of South Dakota.
	www2.nature.nps.gov /geology/paleontology/pub/fossil_conference_6/cicimurri.htm (9584 words)

	inoceramid overview
		The Lower Turonian, although only a brief portion of inoceramid history, represents an ideal interval to study a number of these problems which can, at least in concept, be applied to many different time periods as well.
		At the Hamburg inoceramid workshop, debate regarding Cladoceramus as a valid genus in the Early Turonian focused on two things: (1) whether or not Cladoceramus should be placed in synonymy with the genus Platyceramus, and (2) whether or not Rhyssomytiloides should be allowed to stand as a genus, rather than being synonymized with Cladoceramus.
		The attempt of Kennedy and Cobban (1991) to simplify Early Turonian inoceramid zonation by establishing two zones (Mytiloides columbianus and M. mytiloides) for the section at Pueblo, Colorado, is herein rejected.
	www.fuhrmann-hilbrecht.de /Heinz/geology/InoIntro/InoIntro.html (11776 words)

	Cretaceous facies and fossil leaf beds
		Because the pit is now being prepared for residential and commercial development, and the extraordinary geologic exposures on the south side of the pit have been destroyed by grading and planted grass, I wanted to preserve what was once exposed and the fossil leaves and flowers discovered there for future students of geology and paleobotany.
		Fossil Clusiaceae from the Late Cretaceous (Turonian) of New Jersey and implications regarding the history of bee pollination.
		The earliest fossil evidence of the Hamamelidaceae: late Cretaceous (Turonian) inflorescences and fruits of Altingioideae.
	www.sunstar-solutions.com /sunstar/Sayreville/Kfacies.htm (3852 words)

	e-Prints Soton - Testing the Cretaceous greenhouse hypothesis using glassy foraminiferal calcite from the core of the ...
		Glassy Turonian foraminifera preserved in clay-rich sediments from the western tropical Atlantic yield the warmest equivalent δ18O sea-surface temperatures (SSTs) yet reported for the entire Cretaceous-Cenozoic.
		We estimate Turonian SSTs that were at least as warm as (conservative mean ~30 °C) to significantly warmer (warm mean ~33 °C) than those in the region today.
		We infer that this mismatch is either an artifact of a hidden Turonian pulse in global ocean-crust cycling or real evidence of the influence of some other factor on atmospheric CO2 and/or SSTs.
	eprints.soton.ac.uk /6149 (347 words)

	HeiDok - Turonian inoceramids and biostratigraphy of the Sergipe Basin, northeastern Brazil: an integrated study of the ...
		Turonian inoceramids and biostratigraphy of the Sergipe Basin, northeastern Brazil: an integrated study of the Votorantim and Nassau quarries
		The lower Turonian is subdivided into the Mytiloides puebloensis, M. kossmati—M. mytiloides and M. labiatus zones, the middle Turonian into the M. subhercynicus and M. hercynicus zones, and the upper Turonian into the M. striatoconcentricus, M. incertus, M. scupini and Cremnoceramus waltersdorfensis waltersdorfensis zones.
		On the basis of a large number of common elements, the Turonian inoceramid zonation of Sergipe is reliably correlated with the European and U.S. Western Interior zonation.
	www.ub.uni-heidelberg.de /archiv/5694 (1068 words)

	Norge - Lundin Petroleum
		It confirmed the presence of gas and oil within the hydrocarbon bearing Turonian reservoir sands, and penetrated a new deeper oil bearing Cenomanian sandstone reservoir at a depth of approximately 7,900 feet TVDSS.
		The two main reservoirs, the Turonian and the Cenomanian, which tested hydrocarbon successfully in both Aje-1 and Aje-2 were found to be significantly down dip from the discovery well as well as below the existing oil water contact defined in Aje-2 at the Cenomanian level.
		The Turonian reservoir interval in Aje-3 was above the gas water contact encountered in both Aje-1 and Aje-2 but the presence of gas in the reservoir could not be tested due to poor reservoir properties at the Aje-3 location.
	www.lundin-petroleum.com /sve/operation_nigeria.php (837 words)

	Project Bauer
		We study the sedimentologic, cyclostratigraphic and paleogeographic evolution of 21 Cenomanian and Turonian sections in the Sinai.
		Diversities and frequencies of benthic foraminifers, calcareous algae and rudists differ distinctively in the late Cenomanian-Turonian southern Tethyan inner platform deposits of the Sinai peninsula: Rudists and benthic foraminifers are common in the upper Cenomanian successions but occurrences decline drastically in the lower Turonian and recover again in the middle-upper Turonian.
		In contrast, calcareous algae of upper Cenomanian deposits are poor in species-and flourish in the lower and upper Turonian.
	www.palmod.uni-bremen.de /FB5/geochron/Jan/JBproj.html (513 words)

	51505-QUANTITATIVE CYCLOSTRATIGRAPHIC ANALYSIS OF LATE CENOMANIAN-EARLY TURONIAN DEPOSITS OF THE CRETACEOUS WESTERN ... (Site not responding. Last check: 2007-11-07)
		Late Cenomanian-Early Turonian hemipelagic deposits of the Cretaceous Western Interior (North America) are characterized by laterally extensive lithologic couplets traceable over 1000's of kilometers within the basin.
		In this study we report initial results from a quantitative cyclostratigraphic analysis of late Cenomanian-early Turonian sedimentation patterns across latitude in the Western Interior basin.
		These results are based on the analysis of new core data from the northern part of the basin (Saskatchewan, Canada), in addition to an analysis of new data from the previously studied central basin core (Colorado, USA).
	rock.geosociety.org /absindex/annual/2000/51505.htm (268 words)

	Rapid Evolution of Mosasaurs
		During the Turonian, plesiosaurs were reduced to two families, the elasmosaurids and polycotylids, which apparently survived into the Maastrichtian.
		Freed from the necessity of laying their eggs on land, mosasaurs were probably completely marine animals by the early Turonian.
		A new mosasauroid (Squamata) from the Late Cretaceous (Turonian) of Morocco.
	www.oceansofkansas.com /RapidMosa.html (6420 words)

	Midlatitude shelf seas in the Cenomanian-Turonian greenhouse world: Temperature evolution and North Atlantic circulation
		An 8 million year record of subtropical and midlatitude shelf-sea temperatures, derived from oxygen isotopes of well-preserved brachiopods from a variety of European sections, demonstrates a long-term Cenomanian temperature rise (16–20°C, midlatitudes) that reached its maximum early in the late Turonian (23°C, midlatitudes).
		In the mid-Cenomanian and the late Turonian, two minor shelf-sea cooling events (2–3°C) coincide with carbon cycle perturbations and times of high-amplitude sea level falls.
		Although this evidence supports the hypothesis of potential glacioeustatic effects on Cretaceous sea level, the occurrence of minimum shelf-sea temperatures within transgressive beds argues for regional changes in shelf-sea circulation as the most plausible mechanism.
	www.agu.org /pubs/crossref/2004/2004PA001015.shtml (391 words)

	SITE 1276 SYNTHESIS
		The Albian sediment influx is attributed to enhanced continental weathering in a warm humid climate, possibly accentuated by clastic input from active rifts farther north.
		Sedimentary cores from lithologic Unit 5 are uppermost Aptian(?) to basal Turonian claystones and mudstones that have low NRM intensity and low magnetic susceptibility.
		Preliminary results are encouraging, and they demonstrate that certain Leg 210 cores seem to be suitable for magnetic detection and extraction of climatic cycles and sedimentary changes in the Cretaceous.
	www-odp.tamu.edu /publications/210_IR/chap_01/c1_6.htm (3961 words)

	SVIBOR - Papers - project code: 1-09-023
		The presence of a new species of Prionocyclus, P. varicostatus, associated with late Turonian planctonic foraminifera in a pelagic incursion on the island of Dugi Otok, is therefore of some significance.
		Summary: The profile in the Brbinica Cove is situated in the central partof the Dugi Otok Island, between the slope deposits in thenorthwest and the platform deposits in the southeast.
		In theMiddle Turonian, investigated part of the Adriatic carbonateplatform was differentiated into shallow water and deeper waterfacies of the carbonate ramp.
	www.mzos.hr /svibor/1/09/023/rad_e.htm (3100 words)

	Institute of Geology and Mineralogy, Uni Köln - Dr. Silke Voigt - publications
		Voigt, S., and Wiese, F., 2000, Evidence for Late Cretaceous (late Turonian) climate cooling from oxygen-isotope variations and palaeobiogeograpic changes in Western and Central Europe: Journal of the Geological Society, v.
		Voigt, S., 2000, Stable isotopic evidence for late Turonian climate cooling: Global causes and regional consequences for the European epicontinental shelf sea.
		Voigt, S., 1998, Late Turonian bottom water peleotemperatures of the epicontinental shelf sea - Oxygen isotope studies in pelagic carbonates and brachiopod shells from Lower Saxony.
	www.uni-koeln.de /math-nat-fak/geomin/en_voigt_publ.html (1337 words)

	Sharks of Kansas
		A Middle Turonian marine fish fauna from the Upper Blue Hill Shale Member, Carlile Shale, of north central Kansas.
		In contrast to larger material from transgressive lag faunas at the bases of sequences, the Lovewell fauna consists mostly of very small material (teeth, dermal denticles, vertebrae, and scales), suggesting winnowing by weak, intermittent currents.
		Kirkland, J. Fossil elasmobranchs from the mid Cretaceous (Middle Cenomanian Middle Turonian) Greenhorn Cyclothem of eastern Nebraska.
	www.oceansofkansas.com /KS-sharks.html (7695 words)

	Cretaceous-Paleogene basins of northeast Africa
		The first stages of reverse tectonics and basin inversion commenced in northeast Egypt during the Turonian (Kuss, et al., 2000), but more extensive uplift phases have been evidenced with varying intensities in different regions for younger intervals, e.g.
		The most indicative criteria for uplift are locally confined lateral facies and thickness changes, the local development of pronounced hiatuses, and comparisons of sequence stratigraphic architectures within tectonically stable/unstable areas.
		Many local occurrences of siliciclastic intercalations (namely sandstones) within the carbonate-dominated late Turonian - Paleocene successions of NE Egypt and Sinai may be the result of erosion and resedimentation along such an uplift.
	www.palmod.uni-bremen.de /FB5/geochron/basin_fill.htm (1595 words)

	PD. Dr. Frank Wiese (Site not responding. Last check: 2007-11-07)
		WIESE, F. and WOOD, C.J. 2001: The hexactinellid sponge Cystispongia bursa (QUENSTEDT 1852) from the Turonian and Lower Coniacian (Upper Cretaceous) of northern Germany and England.
		WIESE, F. 1999: Stable isotope data (?13C, ?18O) from the Middle and Upper Turonian (Upper Cretaceous) of Liencres (Cantabria, northern Spain) with a comparison to northern Germany (Söhlde and Salzgitter-Salder).- Newsletters on Stratigraphy, 37 (1/2): 37-62.
		KOSTAK, M. and WIESE, F. 2002: Upper Turonian belemnitellid occurrences in Europe in the light of palaeobiogeography, sealevel fluctuations, and palaeotemperature fluctuations.
	userpage.fu-berlin.de /~palaeont/wiese.htm (1481 words)

	DISCOVERY AND EXCAVATION OF A THERIZINOSAURID DINOSAUR FROM THE UPPER CRETACEOUS TROPIC SHALE (EARLY TURONIAN), KANE ... (Site not responding. Last check: 2007-11-07)
		The skeleton occurred in open marine sediments in association with ammonoids of the upper Watinoceras coloradoense-lower Mammites nodosoides biozone interval of late early Turonian age.
		Some elements were compressed by compaction, and the skeleton was slightly disarticulated owing to settling after coming to rest in the soft marine sediments.
		It seems to be related to the recently described therizinosaurid dinosaur Nothronychus mckinleyi Kirkland and Wolfe 2001 from the Middle Turonian of southwestern New Mexico.
	gsa.confex.com /gsa/2002RM/finalprogram/abstract_33860.htm (428 words)

	NMBGMR Memoir 41 (Site not responding. Last check: 2007-11-07)
		Describes an early Turonian ammonite fauna found chiefly in Cibola County, New Mexico, consisting of nine genera and 10 species of which two genera and two species are new.
		Molluscan fossils of early Turonian age were discovered in 1972 near the top of the Mancos Shale in the Fence Lake area approximately 105 km (65 mi) south of Gallup, New Mexico.
		That the locality was unusual in having an abundant warm water or Tethyan ammonite fauna became apparent, and many collecting trips were made later by the authors as well as by other members of the United States Geological Survey and the New Mexico Bureau of Mines and Mineral Resources.
	geoinfo.nmt.edu /publications/memoirs/41/home.html (767 words)

	Dominican Earthquake Working Group Planning Meeting and Field Trip to Aruba
		A sedimentary unit of pebbly mudstone, argillite, and basaltic tuff is interstratified with the pillow basalt.
		This folding event occurred in Turonian time and was over by the time of the emplacement of the Aruba batholith that is well dated by U-Pb dating to be 89 my old.
		A Cretaceous subaerial weathering surface characterized by these distinctive colorations around fractures separates the underlying Turonian section of pillow basalt, argillite, and diabase from an overlying late Cretaceous section of basaltic lapilli tuff and conglomerate.
	www.ig.utexas.edu /research/projects/venez_margin/aruba_fieldtrip/aruba_meeting.htm (640 words)

	Papers:
		Bąk, M., Bąk, K. and Gaździcka, E. Radiolaria, calcareous nannoplankton, agglutinated and planktonic foraminiferal biostratigraphy of the Upper Cenomanian – lower Turonian deep-water deposits of the Polish Outer Carpathians.
		Bąk, M., Bąk, K. and Gaździcka, E. High-resolution radiolarian, foraminiferal and calcareous nannoplankton biostratigraphy of the Upper Cenomanian – lower Turonian deep-water sediments in the Polish Outer Carpathians.
		Bąk, K., Bąk, M., Gasiński, A.M. and Jamiński, J. Biostratigraphy of Albian to Turonian deep-water agglutinated foraminifera calibrated by planktonic foraminifera, Radiolaria, and dinoflagellate cysts in the Pieniny Klippen Belt, Polish Carpathians.
	www.uj.edu.pl /ING/staff/bak/Bak_papers.html (2371 words)

	ELASMO.COM Fossil - Paleo-faunas: Cretaceous of Utah
		These deposits from the western margin of the Inland Cretaceous Seaway would be relatively deep-water, offshore deposits dating to the late Cenomanian through Middle Turonian.
		At the discussed locale a 10 foot layer of the Dakota Sandstone is exposed.
		The ridge pattern should be diagnostic, but this tooth compares poorly with examples provided by Welton and Farish.
	www.elasmo.com /paleo/fauna/ut_cret.html (1207 words)

	CONTROLS ON STRATIGRAPHIC ARCHITECTURE OF CENOMANIAN-TURONIAN STRATA, WESTERN INTERIOR BASIN
		A key attribute is correlation of an orbital time scale from the rhythmically bedded C-T strata of the basin center to the marginal marine section based on biostratigraphic and bentonite datums.
		Using this time scale, siliciclastic sediment accumulation (compacted) is estimated to have decreased from ~90 m/myr (late Cenomanian) to 50 m/myr (early Turonian).
		These high rates of accumulation characterize the unique accommodation and sediment supply attributes of the Sevier foredeep, which made possible the preservation of a complex but highly detailed record of relative sea level changes.
	gsa.confex.com /gsa/2005AM/finalprogram/abstract_94735.htm (518 words)

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