Results 101 to 110 of about 147,685 (356)
A hidden cradle of plant evolution in Permian tropical lowlands
Science, 2018 Late Permian seed-plant evolution The great evolutionary expansion of seed plants took place in the Mesozoic era, which began after the Permian mass extinction 252 million years ago. Blomenkemper et al.
P. Blomenkemper +4 more
semanticscholar +1 more source
Energy Science &Engineering, EarlyView.ABSTRACT The permeability of coal reservoirs is predominantly controlled by the present tectonic stress field. This study systematically integrates macro‐ and micro‐scale analytical methods to investigate the controlling mechanisms of tectonic stress on pore‐fracture characteristics and permeability in the Longtan Formation coal reservoirs.
Guoqing He +6 more
wiley +1 more source
Chirotherium barthii Kaup 1835 from the Triassic of the Isle of Arran, Scotland [PDF]
, 2002 The mould of a track from SE Arran, and several in situ trackways and individual tracks, as well as a partial trackway on a loose block of Triassic sandstone, from western Arran, represent the first verifiable fossil tracks of Chirotherium from the ...
BENTON +14 more
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Energy Science &Engineering, EarlyView.ABSTRACT Nuclear magnetic resonance (NMR), as an advanced non‐destructive and rapid measurement technology, has shown unique advantages in the evaluation of unconventional shale reservoirs. This paper systematically introduces the fundamental principles of NMR spectroscopy and relaxation theory in porous media and comprehensively analyzes the ...
Long Zhou +8 more
wiley +1 more source
, 2019 Eight amniote genera (representing four clades) became aquatic during the Permian. The four clades were mesosaurids, tangasaurids, the neodiapsid Claudiosaurus, and the procolophonid Barasaurus. Two of eight genera survived the end-Permian mass extinction, but did not last long into the Mesozoic.
openaire +4 more sources
The Permian Bacterium that Isn't
Molecular Biology and Evolution, 2001 There is growing evidence for the presence of viable microorganisms in geological salt formations that are millions of years old. It is still not known, however, whether these bacteria are dormant organisms that are themselves millions of years old or whether the salt crystals merely provide a habitat in which contemporary microorganisms can grow ...
Tal Pupko, Dan Graur
openaire +2 more sources
Carbon Storage in Fold‐and‐Thrust Belts: An Overlooked Gigatonne Storage Opportunity
Greenhouse Gases: Science and Technology, EarlyView.ABSTRACT This study presents numerical investigations of the trapping characteristics of fold‐and‐thrust belt structures, defining three carbon capture and storage (CCS) play types that could be used to store commercial volumes (millions of tonnes) of CO2.
Lars W. Koehn +4 more
wiley +1 more source
The Ability of Non-Music Majors to Self-Evaluate at the End of a Music Course
Journal of Educators Online, 2016 The researchers of this study investigated the participants’ (N = 177) use of a self-evaluation tool employed at the end of an online undergraduate music course that fulfilled the Texas general education requirement for the creative arts.
Dan Keast, Larke Tapper
doaj
1º Congresso Internacional de Geologia de Timor-Leste. [PDF]
, 2012 Congresso Internacional de Geologia de Timor ...
Costa, Norberta, Nogueira, Pedro
core
Detrital zircon SHRIMP U-Pb age study of the Cordillera Darwin Metamorphic Complex of Tierra del Fuego : sedimentary sources and implications for the evolution of the Pacific margin of Gondwana [PDF]
, 2010 The Cordillera Darwin Metamorphic Complex in the southernmost Andes includes a basement of probable Palaeozoic age, a mid-Jurassic and younger volcano-sedimentary cover, and a suite of Jurassic granites, all of which were jointly metamorphosed during the
Calderon, M. +6 more
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