Results 91 to 100 of about 43,967 (245)

Decoupling of morphological disparity and taxic diversity during the adaptive radiation of anomodont therapsids [PDF]

open access: yes, 2013
Adaptive radiations are central to macroevolutionary theory. Whether triggered by acquisition of new traits or ecological opportunities arising from mass extinctions, it is debated whether adaptive radiations are marked by initial expansion of taxic ...
Anderson MJ   +7 more
core   +1 more source

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

open access: yesSedimentology, EarlyView.
ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder   +2 more
wiley   +1 more source

CHRONOLOGICAL AND GEOGRAPHICAL DISTRIBUTION OF THE FAM. COMELICANIIDAE MERLA, 1930 (BRACHIOPODA)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
The comelicaniid brachiopods, typical fossils of the Upper Permian, have been considered the markers for the Lower Dorashamian. They show a Wide geographical distribution, that is from the Southern Alps (Italy) to Himalayan region - Dolomites and Carnia (
RENATO POSENATO
doaj  

Review of the Permian family Permulidae nomen novum pro Aliculidae Storozhenko, 1997 (Grylloblattida)

open access: yesZooKeys, 2011
A new replacement name Permulidae nom. n. is proposed for the Permian family Aliculidae Storozhenko, 1997 (Insecta: Grylloblattida). A review of Permulidae is given. All genera and species are redescribed and illustrated. A key to genera of Permulidae is
Daniil Aristov, Sergey Storozhenko
doaj   +1 more source

The Permo-Carbonigferous Facies Development in Thailand: A plate tectonic discussion [PDF]

open access: yes, 1989
The Permo-Carboniferous sedimentary facies development in Thailand reflects the late Variscan orogeny in S E Asia. During the Carboniferous and Permian, a N -S trending trough separated the " S h a n Thai Craton" and the "Indosinia Craton".
Altermann, Wladyslaw
core   +1 more source

Chondrites isp. Indicating Late Paleozoic Atmospheric Anoxia in Eastern Peninsular India

open access: yesThe Scientific World Journal, 2014
Rhythmic sandstone-mudstone-coal succession of the Barakar Formation (early Permian) manifests a transition from lower braided-fluvial to upper tide-wave influenced, estuarine setting. Monospecific assemblage of marine trace fossil Chondrites isp.
Biplab Bhattacharya, Sudipto Banerjee
doaj   +1 more source

Indosinian high-strain deformation for the Yunkaidashan tectonic belt, south China : Kinematics and 40Ar/39Ar geochronological constraints [PDF]

open access: yes, 2007
Structural and 40Ar/39Ar data from the Yunkaidashan Belt document kinematic and tectonothermal characteristics of early Mesozoic Indosinian orogenesis in the southern part of the South China Block.
Bureau of Geology and Mineral Resources of Guangdong Province (GDBGMR)   +90 more
core   +1 more source

Early Permian crinoids from Laurasia and their paleogeographic implications [PDF]

open access: yesActa Palaeontologica Polonica
A new crinoid fauna is described from the Trogkofel Group of the Southern Karavanke Mountains, Slovenia (lower Permian, Artinskian). This fauna is from a shallow platform or upper slope setting and is comprised primarily of isolated aboral cups.
William I. Ausich   +5 more
doaj   +1 more source

Chronological link between deep-seated processes in magma chambers and eruptions: Pemo-Carboniferous magmatism in the core of Pangaea (southern Pyrenees) [PDF]

open access: yes, 2014
In the Southern Pyrenees there are Upper Carboniferous–Lower Permian sedimentary basins with a significant volume of volcanic material derived from explosive eruptions (rhyolitic ignimbrites and andesitic flows).
Castro, Antonio   +6 more
core  

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