Results 71 to 80 of about 7,297 (224)
Darriwilian Saucrorthis Fauna: implications for the Great Ordovician Biodiversification Event (GOBE) [PDF]
Estonian Journal of Earth Sciences, 2014 The Saucrorthis Fauna is a brachiopod-dominated shelly fauna developed in relatively deeper-water benthic regimes of a few peri-Gondwana terranes (e.g.
Renbin Zhan +5 more
doaj +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska +6 more
wiley +1 more source
Acritarchs of Llandeilo and Caradoo age from classic localities in Britain. [PDF]
, 1979 The last two decades have seen the publication of a large number of papers dealing with Palaeozoic acritarchs including many devoted to the description of Ordovician assemblages.
Turner, Robert Eric
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Reservoir-forming conditions of platform margin belt in southern slope of Tazhong, Tarim Basin
Petroleum Exploration and Development, 2008 Based on the new seismic and logging data, this paper identifies the location and shape of the platform margin belt in Tazhong, Tarim Basin and studies its structural characteristics and reservoir-forming conditions using isochronous sequence framework ...
Zhi-qian GAO +4 more
doaj +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract We investigated the structural framework of the north–northwestern Paraná Basin in Brazil to test whether the pre‐impact structures in this region may have had any influence on the first‐order formation and morphostructure of the Araguainha impact structure (AIS).
Renato B. Bernardes +5 more
wiley +1 more source
Revisiting the Hummeln structure, Sweden—A shallow marine Cambrian impact structure
Meteoritics &Planetary Science, EarlyView.Abstract Hummeln is a simple impact structure located in south‐eastern Sweden. It is approximately 1.2 km in diameter and almost completely covered by a lake. Here, we present the first detailed investigation of impactites and mapping of the 164.25 m deep drill core Hummeln‐1 with a focus on impact metamorphism and the impact process.
S. Alwmark +8 more
wiley +1 more source
South America’s earliest (Ordovician, Floian) crinoids [PDF]
, 2015 Two new Early Ordovician crinoids have been discovered in Gondwanan rocks of northwest Argentina. Ramseyocrinus argentinus n. sp., among the most complete for the genus, aids in reconstructing key morphology.
Guensburg, Thomas E. +1 more
core +1 more source
Sedimentology, EarlyView.ABSTRACT Aeolian deflationary events are erosive to static stages where sediment supply is insufficient to support bedform migration and preservation in the rock record. In the vicinity of shallow‐marine environments, inland rises of relative water table and associated generation of deflationary super surfaces may be driven by the onset of ...
Victor J. P. Hême de Lacotte +4 more
wiley +1 more source
A new species of graptolite from the western margin of the Kufra Basin, Libya
Normalograptus kufraensis sp. nov. occurs as monospecific assemblages in the Tanezzuft Formation at the western margin of the Kufra Basin (Jabal Eghei), southern Libya.
Elgardy, Mohamed +3 more
core +1 more source
Palaeozoic and Mesozoic Palaeomagnetism of South America: Results from Peru, Bolivia, Argentina, and Brazil. [PDF]
, 2004 Im Rahmen der vorliegenden Arbeit, wurden in verschiedenen Regionen Südamerikas detaillierte paläomagnetische Untersuchungen durchgeführt. Ziel dieser Arbeiten war die Erstellung einer hochauflösenden scheinbaren Polwanderkurve für Gondwana im ...
Rakotosolofo, Nicolas A.
core