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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Indian Peninsula
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India
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Uttar Pradesh India (1)
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Siberia (1)
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Atlantic Ocean
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North Atlantic
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Elba (1)
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Europe
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Invertebrata
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igneous rocks
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Primary terms
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Asia
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Indian Peninsula
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India
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Uttar Pradesh India (1)
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Siberia (1)
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Atlantic Ocean
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Canada
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Eastern Canada
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Quebec
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carbon
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climate change (1)
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crust (2)
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Europe
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Estonia (3)
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Central Europe
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Austria (1)
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Switzerland
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Southern Europe
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Italy
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France (1)
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geochemistry (1)
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ground water (1)
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inclusions
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intrusions (1)
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Invertebrata
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Cnidaria
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Anthozoa
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Zoantharia
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Tabulata (1)
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-
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Mollusca
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Tentaculitida (1)
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Porifera
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Stromatoporoidea (1)
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-
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isotopes
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stable isotopes
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C-13/C-12 (1)
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metals (1)
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metamorphic rocks
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amphibolites (1)
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eclogite (1)
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metasedimentary rocks (1)
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schists (1)
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metamorphism (2)
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orogeny (1)
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paleoclimatology (2)
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paleoecology (3)
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paleogeography (2)
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Paleozoic
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lower Paleozoic (1)
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Ordovician
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Lower Ordovician
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El Paso Group (1)
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Middle Ordovician
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Chazy Group (1)
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Upper Ordovician
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Hirnantian (1)
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Katian (1)
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Sandbian (1)
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Silurian
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Lower Silurian (1)
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Plantae
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Spermatophyta
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Angiospermae (1)
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reefs (1)
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sea-level changes (3)
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sedimentary rocks
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sedimentary structures
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sedimentation (2)
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stratigraphy (1)
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United States
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New York
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Clinton County New York (1)
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Texas
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El Paso County Texas
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El Paso Texas (1)
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Vermont
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Grand Isle County Vermont (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks (1)
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siliciclastics (1)
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sedimentary structures
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mounds (1)
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sedimentary structures
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biogenic structures
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bioherms (1)
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sediments
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sediments
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carbonate sediments (1)
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clastic sediments
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sand (1)
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marine sediments (1)
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siliciclastics (1)
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Arina Formation
Porkuniconchus fragilis n. gen. n. sp. from Ärina Formation (Hirnantian), ...
A new genus and species of cornulitid tubeworm from the Hirnantian (Late Ordovician) of Estonia
Wrinkled undersurface of soft-surface encrusters: A ) Stromatoporoid Eccl...
Stratigraphy of the reefs discussed in the text. El Paso Group reefs of Tex...
Maps of the geographical position of the reefs discussed in the text. The w...
THE REENGINEERING OF REEF HABITATS DURING THE GREAT ORDOVICIAN BIODIVERSIFICATION EVENT
Ordovician reef and mound evolution: the Baltoscandian picture
The tectono-metamorphic history of the Valaisan domain from the Western to the Central Alps: New constraints on the evolution of the Alps
Estimating P-T metamorphic conditions on the roof of a hidden granitic pluton: an example from the Mt. Calamita promontory (Elba Island, Italy)
Ordovician sea-level change and rapid change in crustal subsidence rates in East Siberia and Baltoscandia
Hydrochemical Characterization of Groundwater in Lower Kali Watershed, Western Uttar Pradesh
Reefs during the multiple crises towards the Ordovician–Silurian boundary: Anticosti Island, eastern Canada, and worldwide
Acoustic facies and seabed features of the mixed carbonate-siliciclastic deposits of the last eustatic cycle in the La Maddalena Archipelago (North Sardinia, Italy)
Abstract This paper summarizes recent knowledge on the palaeontology, biostratigraphy, correlation, sea-level and climate history and isotopic geochemistry of the Ordovician rocks in the western and central parts of the East European Craton, in the area extending from the southern margin of the Fennoscandian Shield to the western margin of the Ukrainian Shield. The regional chronostratigraphic standard is briefly summarized and its correlation to the global standard of the Ordovician is addressed. A two-part correlation chart of 10 areas with unique local Ordovician successions is aligned with the most recent international correlation standard of the Ordovician System and presented against the regular timescale. An updated summary of the evolution of the marine assemblages is provided, the principal gaps in the existing extremely rich palaeontological database are identified and the main bioevents are discussed.
Biogeographical patterns of Ordovician ostracods
Abstract The biogeography of marine shelf ostracod genera is analysed for two Ordovician time slabs, the earliest Late Ordovician and the terminal Ordovician, that have been considered to reflect comparatively warmer and cooler global climate states, respectively. The earlier time slab is equivalent to the Nemagraptus gracilis graptolite interval (centred about 460 Ma), and defined as the total range of the eponymous species. The Hirnantian time slab comprises the Normalograptus extraordinarius and Normalograptus persculptus graptolite biozones (445.6–443.7 Ma). The ostracod dataset consists of 160 taxa from 24 early Late Ordovician localities and 86 taxa from 10 Hirnantian localities. Ordination and variation partitioning analyses show that patterns in ostracod distribution in the gracilis time slab are largely related to palaeocontinental affinity of the samples and to a lesser degree to palaeolatitude. Some decrease of provincialism can be suggested for the Hirnantian, although the ostracod dataset is limited for this interval.
Detrital Fingerprints of Fossil Continental-Subduction Zones (Axial Belt Provenance, European Alps)
Alpine tectonics of the Alps and Western Carpathians
Abstract The Alps and Western Carpathians constitute that part of the Alpine-Mediterranean orogenic belt which advances furthest to the north into Central Europe. They were formed by a series of Jurassic to Tertiary subduction and collision events affecting several Mesozoic ocean basins, continental margins, and continental fragments. The Western Alps form a pronounced, westward-convex arc around which the strike of the tectonic units changes by almost 180° ( Fig. 18.1 ). The Western Carpathians are a northward-convex arc of similar size but with minor curvature. The two arcs are connected by an almost straight, WSW-ENE striking portion including the Eastern Alps Stresses produced by tectonic processes in the Alps also influenced the tectonics of large parts of central and northern Europe, leading, for example, to basin inversion and strike-slip faulting. In this chapter, we will discuss the present-day structure of the different tectonic units in the Alps and Western Carpathians in relation to their palaeotectonic history in order to illustrate the plate tectonic evolution using geological data. Many tectonic problems of the Alps and Western Carpathians are still unsolved, although dramatic progress has been made, especially over the last c. 20 years. Therefore, some of the interpretations presented below are still controversial and do not always express the opinion of all three authors. Given that the main theme of this book is Central Europe, the Southern and Western Alps are discussed in less detail than those parts of the Alps which belong to Central Europe: the Central Alps, the Eastern Alps and the Western Carpathians.