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Now showing items 21-40 of 25654

SIGNIFICANCE OF MICROBIALITES, CALCIMICROBES, AND CALCAREOUS ALGAE IN REEFAL FRAMEWORK FORMATION FROM THE SILURIAN OF GOTLAND, SWEDEN

Nose M.; Schmid D.U.; Leinfelder R.R. (2006)

The structure of stromatoporoid-tabulate coral reefs from the Mid- to Upper Silurian of Gotland includes complex microbialite and algal framework fabric. Non-skeletal microbialites show variable fabrics, structures, and ...
SEDIMENTOLOGY OF RIFT CLIMAX DEEP WATER SYSTEMS; LOWER RUDEIS FORMATION, HAMMAM FARAUN FAULT BLOCK, SUEZ RIFT, EGYPT

Leppard C.W.; Gawthorpe R.L. (2006)

In most marine rift basins, subsidence outpaces sedimentation during rift climax times. Typically this results in sediment-starved hangingwall depocentres dominated by deep-marine mudstones, with subordinate local development ...
EDIACARAN FOSSIL PRESERVATION: TAPHONOMY AND DIAGENESIS OF A DISCOID BIOTA FROM THE AMADEUS BASIN, CENTRAL AUSTRALIA

Mapstone N.B.; McIlroy D. (2006)

Aspects of the preservation of the enigmatic soft-bodied Ediacara biota in relatively coarse-grained siliciclastic sediments remain unresolved. The taphonomic model proposed by Gehling in 1999 is here validated through ...
THE CADOMIAN UNCONFORMITY IN THE SAXO-THURINGIAN ZONE, GERMANY: PALAEOGEOGRAPHIC AFFINITIES OF EDIACARAN (TERMINAL NEOPROTEROZOIC) AND CAMBRIAN STRATA

Buschmann B.; Elicki O.; Jonas P. (2006)

The most complete Ediacaran (terminal Neoproterozoic) to Early Cambrian record in the Saxo-Thuringian Zone is provided by the Cadomian-deformed Ediacaran Rothstein Formation and the unconformably overlying Early Cambrian ...
PLACER FORMATION IN GRAVEL-BEDDED RIVERS: A REVIEW

Carling P.A.; Breakspear R.M.D. (2006)

The literature on placer formation processes within fluvial systems is widespread and ranges between detailed laboratory studies of the hydrodynamic segregation processes through to the intuitive interpretation of the ...
A NEW EARLY DEVONIAN THELODONT FROM CELTIBERIA (SPAIN), WITH A REVISION OF SPANISH THELODONTS

Botella H.; Valenzuela-Ríos J.I.; Carls P. (2006)

A revision of thelodont scales from the Lower Devonian of the Iberian Chains enables their grouping into two taxa: Turinia pagei and T. nachoi sp. nov. These taxa are clearly distinguishable by morphological and histological ...
BRYOZOAN FAUNAS IN THE MIDDLE MIOCENE OF HUNGARY: BIODIVERSITY AND BIOGEOGRAPHY

Moissette P.; Dulai A.; Müller P. (2006)

A study of the Badenian (Middle Miocene) marine deposits of Hungary yielded a rich bryozoan fauna of 238 species comprising 59 cyclostomes, 176 cheilostomes, and 3 ctenostomes. Six palaeobiogeographic groups have been ...
HOLOCENE MARINE DIATOMS FROM THE FAEROE ISLANDS AND THEIR PALEOCEANOGRAPHIC IMPLICATIONS

Witon E.; Malmgren B.; Witkowski A.; Kuijpers A. (2006)

Temporal oceanographic changes based on mid- and late Holocene marine diatom floras from the Faeroe Islands region have been studied. The four studied coring sites are located in the Skalafjord and a more open-ocean ...
DIAMOND FROM THE LOS COQUITOS AREA, BOLIVAR STATE, VENEZUELA

Kaminsky F.V.; Zakharchenko O.D.; Khachatryan G.K.; Griffin W.L.; Channer D.M.Der. (2006)

A set of 77 diamond crystals from the Los Coquitos placer on the Guaniamo River in Bolivar State, Venezuela, has been comprehensively studied and compared to previously studied diamond from the Quebrada Grande kimberlite ...
MAGNETIC FABRIC VARIATIONS IN MESOZOIC BLACK SHALES, NORTHERN SIBERIA, RUSSIA: POSSIBLE PALEOMAGNETIC IMPLICATIONS

Chadima M.; Pruner P.; Šlechta S.; Grygar T.; Hirt A.M. (2006)

A 28-m-long section situated on the coast of the Arctic Ocean, Russia (74°N, 113°E) was extensively sampled primarily for the purpose of magnetostratigraphic investigations across the Jurassic/Cretaceous boundary. The ...
MODELING THE THERMODYNAMIC PARAMETERS OF SIX ENDMEMBER GARNETS AT AMBIENT AND HIGH PRESSURES FROM VIBRATIONAL DATA

Chopelas A. (2006)

Raman and infrared spectroscopic data at ambient and high pressures were used to compute the lattice contribution to the heat capacities and entropies of six endmember garnets: pyrope, almandine, spessartine, grossular, ...
FACIES ANALYSIS, PALAEOENVIRONMENTAL RECONSTRUCTION, AND BIOSTRATIGRAPHY OF THE "PESCIARA DI BOLCA" (VERONA, NORTHERN ITALY): AN EARLY EOCENE FOSSIL-LAGERSTäTTE

Papazzoni C.A.; Trevisani E. (2006)

The world-famous "Pesciara di Bolca" Fossil-Lagerstätte has been examined in its palaeontological and sedimentological aspects. A re-examination of the co-occurring age-diagnostic larger foraminifers (Alveolina and Nummulites) ...
GEOCHEMICAL DECOUPLING OF WATER MASSES IN THE VARISCAN OCEANIC SYSTEM DURING LATE DEVONIAN TIMES

Dopieralska J.; Belka Z.; Haack U. (2006)

Neodymium isotope data obtained from conodonts collected in Morocco and Poland attest a geochemical decoupling of seawater in the Variscan realm during the Late Devonian. The water masses on the shelves were characterized ...
VARIABILITY OF THE NORTH ATLANTIC CURRENT DURING THE LAST 2000 YEARS BASED ON SHELF BOTTOM WATER AND SEA SURFACE TEMPERATURES ALONG AN OPEN OCEAN/SHALLOW MARINE TRANSECT IN WESTERN EUROPE

Eiríksson J.; Gudmundsdóttir E.R.; Bartels-Jónsdóttir H.B.; Knudsen K.-L.; Cage A.G.; Austin W.E.N.; Klitgaard-Kristensen D.; Marret F.; Rodrigues T.; Abrantes F.; Jiang H.; Sejrup H.-P. (2006)

Marine localities on the west European shelf have been studied to reconstruct the nearshore palaeoceanography of the last two millennia. The sites form a transect from the Iberian margin northeastward via Scotland to western ...
VEGETATION COVER IN A WARMER WORLD SIMULATED USING A DYNAMIC GLOBAL VEGETATION MODEL FOR THE MID-PLIOCENE

Haywood A.M.; Valdes P.J. (2006)

In this study we employ the TRIFFID (Top-down Representation of Interactive Flora and Foliage Including Dynamics) Dynamic Global Vegetation Model (DGVM) and the Hadley Centre Atmospheric General Circulation Model version ...
THE URANIUM MINERALIZATION POTENTIAL OF THE PALEOPROTEROZOIC SIOUX BASIN AND ITS RELATIONSHIP TO OTHER BASINS IN THE SOUTHERN LAKE SUPERIOR REGION

Hanly A.J.; Kyser T.K.; Hiatt E.E.; Marlatt J.; Foster S. (2006)

The Paleoproterozoic Sioux Basin and the Baraboo, Barron, Flambeau, McCaslin, and Waterloo quartzites in northcentral USA are all supermature quartz arenites that are among the world's oldest redbeds. These quartzites were ...
THE CRYSTAL STRUCTURE OF KIRKIITE, PB10BI3AS3S19

Makovicky E.; Balić-Žunić T.; Karanović L.; Poleti D. (2006)

The crystal structure of kirkiite has been solved using single-crystal data (MoKα X-ray diffraction, CCD area detector) to the conventional R-factor R1 = 0.069. It crystallizes in space group P21/m, with a 8.621(4), b ...
SEISMIC VELOCITY STRUCTURE OF A LARGE MAFIC INTRUSION IN THE CRUST OF CENTRAL DENMARK FROM PROJECT ESTRID

Thybo H.; Sandrin A.; Nielsen L.; Lykke-Andersen H.; Keller G.R. (2006)

The origin of regional sedimentary basins is being investigated by the ESTRID project (Explosion Seismic Transects around a Rift In Denmark). This project investigates the mechanisms of the formation of wide, regional ...
THE EARLY TRIASSIC AMMONOID RECOVERY: PALEOCLIMATIC SIGNIFICANCE OF DIVERSITY GRADIENTS

Brayard A.; Bucher H.; Galfetti T.; Escarguel G.; Fluteau F.; Bourquin S. (2006)

Ammonoids recovered much faster than other marine shelly invertebrates after the end-Permian mass extinction. Based on a refined global data set at the basin level, we investigate the paleobiogeographical global latitudinal ...
CIRCUM-ANTARCTIC PALAEOBATHYMETRY: ILLUSTRATED EXAMPLES FROM CENOZOIC TO RECENT TIMES

Brown B.; Gaina C.; Müller R.D. (2006)

We use a revised set of seafloor spreading isochrons and updated plate tectonic reconstructions to produce palaeo-age and basement depth grids for the Southern Ocean. The palaeo-depth maps illustrate the evolution of the ...

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