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Now showing items 61-80 of 25654

MANGANESE-RICH ASSEMBLAGES IN THE BARRHORN UNIT, TURTMANNTAL, CENTRAL ALPS, SWITZERLAND

Brugger J.; Meisser N. (2006)

The Triassic carbonates of the Briançonnais Domain in Turtmanntal, Western Swiss Alps, contain lenses up to 3 m across filled with Mn- and Fe-rich sediments. These rocks display a fine compositional banding at a millimetric ...
CHELONIAN EGGSHELLS FROM THE LOWER CRETACEOUS KUWAJIMA FORMATION OF THE TETORI GROUP, CENTRAL JAPAN

Isaji S.; Matsushita A.; Hirayama R. (2006)

Chelonian eggshell fossils from the Lower Cretaceous Kuwajima Formation of the Tetori Group are described. The eggs were originally spherical or ellipsoidal in shape. The eggshells consist of a single layer of spherulitic ...
A NESTING SITE AND EGG MORPHOLOGY OF A MIOCENE TURTLE FROM URUMACO, VENEZUELA: EVIDENCE OF MARINE ADAPTATIONS IN PELOMEDUSOIDES

Winkler J.D.; Sánchez-Villagra M.R. (2006)

Fossil eggshells from the Late Miocene Urumaco Formation of north-western Venezuela are reported. Stereomicroscopy and scanning electron microscopy were used to examine shell gross morphology and ultrastructure, respectively. ...
ACOUSTIC STRATIGRAPHY OF BEAR LAKE, UTAH-IDAHO - LATE QUATERNARY SEDIMENTATION PATTERNS IN A SIMPLE HALF-GRABEN

Colman S.M. (2006)

A 277-km network of high-resolution seismic-reflection profiles, supplemented with a sidescan-sonar mosaic of the lake floor, was collected in Bear Lake, Utah-Idaho, in order to explore the sedimentary framework of the ...
DINOSAUR EGGS AND NESTING BEHAVIORS: A PALEOBIOLOGICAL INVESTIGATION

Grellet-Tinner G.; Bottjer D.; Chiappe L.; Norell M. (2006)

Although dinosaur eggs were first discovered and identified in the late 1800s, limited attention was given to the scientific value of oological fossils in contrast to observations based on skeletal features. Here, we offer ...
ULTRASTUCTURAL AND FUNCTIONAL MORPHOLOGY OF EGGSHELLS SUPPORTS THE IDEA THAT DINOSAUR EGGS WERE INCUBATED BURRIED IN A SUBSTRATE

Deeming D.C. (2006)

The reproductive biology of dinosaurs is of great interest, particularly in light of the many fossil eggs assigned to this group. The ultrastructural characteristics of dinosaur eggshells are examined in order to calculate ...
THE POSTCRANIUM OF ARCHEGOSAURUS DECHENI, AND A PHYLOGENETIC ANALYSIS OF TEMNOSPONDYL POSTCRANIA

Witzmann F.; Schoch R.R. (2006)

The gharial-like Archegosaurus decheni from the Permian/Carboniferous boundary of south-west Germany is one of the best known temnospondyls. Based largely on new material, we restudied the postcranial anatomy of this ...
DAUPHINÉ TWINNING AND TEXTURE MEMORY IN POLYCRYSTALLINE QUARTZ. PART 1: EXPERIMENTAL DEFORMATION OF NOVACULITE

Wenk H.-R.; Lonardelli I.; Rybacki E.; Dresen G.; Barton N.; Franz H.; Gonzalez G. (2006)

Mechanical Dauphiné twinning in quartz has been of long-standing interest, both in single crystals and polycrystalline aggregates. This study investigates texture development in fine-grained quartz rock novaculite with no ...
THE TOXICOLOGICAL GEOCHEMISTRY OF EARTH MATERIALS: AN OVERVIEW OF PROCESSES AND THE INTERDISCIPLINARY METHODS USED TO UNDERSTAND THEM

Plumlee G.S.; Morman S.A.; Ziegler T.L. (2006)

In this chapter, we have provided a comparatively brief overview of the myriad potential geochemical and biochemical processes that can occur when earth materials come into contact with body fluids via inhalation, ingestion, ...
ULTRAHIGH TEMPERATURE DEFORMATION MICROSTRUCTURES IN FELSIC GRANULITES OF THE NAPIER COMPLEX, ANTARCTICA

Lund M.D.; Piazolo S.; Harley S.L. (2006)

Detailed electron microscope and microstructural analysis of two ultrahigh temperature felsic granulites from Tonagh Island, Napier Complex, Antarctica show deformation microstructures produced at ~ 1000 °C at 8-10 kbar. ...
CALCIMICROBIAL STROMATOLITES AT THE PERMIAN-TRIASSIC BOUNDARY IN A WESTERN TETHYAN SECTION, BüKK MOUNTAINS, HUNGARY

Hips K.; Haas J. (2006)

Basal Triassic carbonates of the Gerennavár Formation (Bükk Mountains, Northern Hungary) were studied. The succession was deposited in an open marine deep ramp environment of the western Tethys, and can be divided into ...
CORONAS, SYMPLECTITIC TEXTURES, AND REACTIONS INVOLVING ALUMINOUS MINERALS IN GEDRITE - CORDIERITE - GARNET GNEISS FROM EVERGREEN, FRONT RANGE, COLORADO

Heimann A.; Spry P.G.; Jacobson C.E.; Teale G.S. (2006)

Gedrite - cordierite - garnet gneisses metamorphosed to the upper amphibolite facies near Evergreen, Colorado, are interlayered with sillimanite - biotite - garnet gneisses and contain spectacular corona, symplectite, and ...
COASTAL DUNE RIDGE SYSTEMS AS CHRONOLOGICAL MARKERS OF PALAEOSEISMIC ACTIVITY: A 650-YR RECORD FROM SOUTHWEST NEW ZEALAND

Wells A.; Goff J. (2006)

A study of two shore-parallel dune ridge sequences in southwest New Zealand shows that tectonic activity has been the primary controlling influence in their formation since at least AD 1450. The timing of dune-building ...
THE PARTITIONING OF WATER BETWEEN NOMINALLY ANHYDROUS MINERALS AND SILICATE MELTS

Kohn S.C.; Grant K.J. (2006)

Many chapters in this volume emphasize that water plays a crucial role in determining the properties and behavior of the mantle. One of the most important examples of the effect of water on mantle behavior is its dramatic ...
ELECTRIC CURRENTS STREAMING OUT OF STRESSED IGNEOUS ROCKS - A STEP TOWARDS UNDERSTANDING PRE-EARTHQUAKE LOW FREQUENCY EM EMISSIONS

Freund F.T.; Takeuchi A.; Lau B.W.S. (2006)

Transient electric currents that flow in the Earth's crust are necessary to account for many non-seismic pre-earthquake signals, in particular for low frequency electromagnetic (EM) emissions. We show that, when we apply ...
STABLE ISOTOPE RECORD OF THE TERMINAL NEOPROTEROZOIC KROL PLATFORM IN THE LESSER HIMALAYAS OF NORTHERN INDIA

Kaufman A.J.; Jiang G.; Christie-Blick N.; Banerjee D.M.; Rai V. (2006)

The terminal Neoproterozoic succession in the Lesser Himalaya of India, including the Infra Krol Formation and Krol Group, represent the thickest known accumulation of carbonate strata of this time period, and hence is an ...
MACROSEISMIC AND INSTRUMENTAL DATA COMPREHENSIVE ANALYSIS: EARTHQUAKE OF JUNE 2, 1930 IN CATALONIA (SPAIN)

Tatevossian R.; Ugalde A.; Batlló J.; Macia R. (2006)

Modern concept of seismic hazard assessment is based on the assumption that what was observed in the past could likely be expected in the future. It could be easily recognized by comparison of spatial distribution of maximum ...
DEVELOPMENT OF THE SOUTHERN EASTERN CORDILLERA, NW ARGENTINA, CONSTRAINED BY APATITE FISSION TRACK THERMOCHRONOLOGY: FROM EARLY CRETACEOUS EXTENSION TO MIDDLE MIOCENE SHORTENING

Deeken A.; Sobel E.R.; Strecker M.R.; Coutand I.; Haschke M.; Riller U. (2006)

For the Puna Plateau and Eastern Cordillera of NW Argentina, the temporal and spatial pattern of deformation and surface uplift remain poorly constrained. Analysis of completely and partially reset apatite fission track ...
MECHANISMS AND DURATION OF NON-TECTONICALLY ASSISTED MAGMA EMPLACEMENT IN THE UPPER CRUST: THE BLACK MESA PLUTON, HENRY MOUNTAINS, UTAH

de Saint-Blanquat M.; Habert G.; Gleizes G.; Horsman E.; Tikoff B.; Morgan S.S.; Launeau P. (2006)

A new study of Black Mesa pluton (Henry Mountains, Colorado Plateau, Utah, USA) indicates that it is a classic example of a small upper-crustal pluton assembled over a few years by incremental amalgamation of discrete magma ...
NEW PALAEONTOLOGICAL ASSEMBLAGE, SEDIMENTOLOGICAL AND CHRONOLOGICAL DATA FROM THE PLEISTOCENE MA U'OI CAVE (NORTHERN VIETNAM)

Bacon A.-M.; Demeter F.; Roussé S.; Duringer P.; Long V.T.; Thuy N.K.; Huong N.T.M.; Antoine P.-O.; Mai B.T.; Dodo Y.; Matsumura H.; Schuster M.; Anezaki T. (2006)

This paper describes recent material gathered during the second fieldwork at Ma U'Oi in November 2002 by a Vietnamese-French-Japanese team. The Ma U'Oi cave, located in the province of Hoà Binh (60 km SW from Hanoi), ...

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