Results 61 to 70 of about 58,521 (270)
Cone-in-cone structure: New data
Литосфера, 2020 Research subject. The article presents the results of investigating calcite lenses with a cone-in-cone structure from Middle Devonian clay terrigenous deposits in the Middle Timan.Methods.
I. Kh. Shumilov
doaj +1 more source
Osteichthyan-like cranial conditions in an Early Devonian stem gnathostome
Nature, 2015 The phylogeny of Silurian and Devonian (443–358 million years (Myr) ago) fishes remains the foremost problem in the study of the origin of modern gnathostomes (jawed vertebrates).
Sam Giles +2 more
semanticscholar +1 more source
Terrestrial Lithium Exploration Adapted From Raman Diagnosis of Phyllosilicates for Mars
Journal of Raman Spectroscopy, EarlyView.Analyses using a benchtop Raman instrument at the University of Aberdeen and a prototype instrument for remote deployment on Mars based at the University of Leicester successfully discriminated between four varieties of mica (possibly lithium‐rich rocks).
M. McHugh +5 more
wiley +1 more source
Geologos, 2023 An update of the main Devonian pre-Variscan palaeogeographical features of the southern Cantabrian Zone is presented. The approximal locations of these features are recorded in sections studied, with thin, incomplete developments for the highs and thick ...
van Loevezijn Gerard B.S.
doaj +1 more source
Lungfish diversity in Romer's Gap: reaction to the end‐Devonian extinction
, 2016 Romer's Gap, the interval following the end‐Devonian extinction event, has been described as a post‐extinction trough for vertebrates. It is a time roughly equivalent to the Tournaisian stage of the early Carboniferous and has been characterized by a ...
T. Smithson, Kelly R. Richards, J. Clack
semanticscholar +1 more source
PLANTS, PEOPLE, PLANET, EarlyView.Herbarium collections are powerful, yet underutilized, tools for global biodiversity conservation and protected area management. By integrating digitized herbarium records with existing biodiversity data, previously unknown plant species were uncovered, exposing critical gaps in conservation knowledge.
Sven P. Batke +6 more
wiley +1 more source
Dimerelloid brachiopod Dzieduszyckia from Famennian hydrocarbon seep deposits of Slaven Chert, Nevada, USA, with insights into systematics and paleoecology of the Dimerelloidea [PDF]
Acta Palaeontologica PolonicaThis study describes an assemblage of Dzieduszyckia brachiopods preserved in sedimentary barite deposits from the Famennian, Upper Devonian of Nevada, USA.
RUSSELL S. SHAPIRO
doaj +1 more source
Journal of Applied Crystallography, EarlyView.The program PRINSAS 2.0 is designed to fit the polydisperse spherical pore model to small‐angle scattering (SAS) data of porous materials. It improves accessibility for users without extensive SAS analysis or programming experience, while being optimized for porous systems commonly found in geological samples.
Phung Nhu Hao Vu +4 more
wiley +1 more source
Boreas, EarlyView.Low‐relief dry channels appear out of place across a glaciated karst landscape in northern Ohio. Channels are only a few metres deep cut into limestone and draped with a veneer of till. Several hypotheses are proposed for explaining the channels. Low‐relief dry channels are observed across the Bellevue‐Castalia Karst Plain of north‐central Ohio, USA ...
Timothy G. Fisher +6 more
wiley +1 more source