Abstract Amalgamation of the Yangtze and Cathaysia blocks in context Gondwana assembly early Paleozoic has been addressed for decades, but far-field effects on Block during amalgamation remain unclear. In this study, we outline sequence stratigraphic framework Ordovician succession central-upper analyze provenance records sandstone compositions, distributions, detritus zircon U-Pb dating. The i...

Marine redox conditions and their dynamic changes were a major factor that controlled the formation of black shale caused late Ordovician marine extinction in Upper Yangtze Basin (South China). However, spatiotemporal variation potential controlling factors this area remain unclear. We analyzed whole-rock geochemistry pyrite sulfur isotopes ( ? 34 S py ) 47 samples from Late Katian to Rhuddania...

Van der Plmjm, B.A., 1987. Timing and spatial distribution of deformation in the Newfoundland Appalachians: a “multi-stage collision” history. In: H.J. Zwart, M. Martens, I. van der Molen, C.W. Passchier, C. Spiers and R.L.M. Vissers (Editors), Tectonic and Structural Processes on a Macro-, Mesoand Micro-Scale. Tectonophysics, 135: 15-24. The Newfoundland Appalachians have been interpreted as a...

-The Ordovician Radiation exhibited a global transition in dominance from the Cambrian evolutionary fauna (e.g., trilobites), to the Paleozoic and Modern faunas (e.g., articulate brachiopods and bivalve molluscs). Although its causes have yet to be determined definitively, the transition coincided with increased global tectonism. Erosion of source areas uplifted during orogenic activity increas...

Transposition in conservative fields reaches its full potential in case that is unexplainable for any well-established theory. There are a number of phenomena and findings in various areas of science that stays in disagreement with those theories. Number of them were analyzed and described in this paper. Additionally, reason for Z-Process and its consequences in the galaxy scale was given.

Thick carbonate rocks were developed in the depression of the Tarim craton during the Cambrian-Middle Ordovician periods. The compressional tectonic movement during the Middle Caledonian-Hercynian created the paleouplifts, which became the base for the paleokarst in the Ordovician carbonate rocks. Based on the large quantity of seismic, drilling, and geological outcrop data, this study analyzed...

BACKGROUND We examine the environmental, climatic and geographical controls on tropical ostracod distribution in the marine Ordovician of North America. METHODOLOGY/PRINCIPAL FINDINGS Analysis of the inter-regional distribution patterns of Ordovician Laurentian ostracods, focussing particularly on the diverse Late Ordovician Sandbian (ca 461 to 456 Ma) faunas, demonstrates strong endemicity a...

The colonization of the terrestrial environment by land plants transformed the planetary surface and its biota, and shifted the balance of Earth's biomass from the subsurface towards the surface. However there was a long delay between the formation of palaeosols (soils) on the land surface and the key stage of plant colonization. The record of palaeosols, and their colonization by fungi and lic...

Abstract We present a ? 13 C carb chemostratigraphy for the Late Ordovician Hirnantian Stage based on 208 whole-rock samples from six outcrops in Oslo–Asker district, southern Norway. Our data include Norwegian type section and Ordovician–Silurian boundary at Hovedøya Island. The most complete record of Isotope Carbon Excursion (HICE) is identified coastal exposure Konglungø locality where pres...