Novel evidence for the youngest Naraoia and a reassessment of naraoiid paleobiogeography [PDF]
Fossil RecordNaraoiids are nektaspidid arthropods that display two exoskeletal shields, typically lack thoracic tergites, and have an exceptional Cambrian diversity. Despite their predominantly Cambrian fossil record, Naraoia species have been documented in deposits ...
Russell D. C. Bicknell +3 more
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The Silurian Frontier of Emersion Stage in the Territory of South Cis-Timan (Perm Region)
Vestnik Permskogo Universiteta: Seriâ Geologiâ, 2020 At the base of the Silurian deposits in the Southern Rassolnaya Deposit, ventfacts considered as an indicator formations of deserts with a predominance of wind erosion (corrosion) processes were first discovered.
Yu. G. Paktovskiy
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Energies, 2021 This study is predominantly about the differences in shale pore structure and the controlling factors of shale gas content between Lower Silurian and Lower Cambrian from the upper Yangtze plate, which are of great significance to the occurrence mechanism
Xiaoyan Zou +5 more
doaj +1 more source
Re‐make, re‐model: evolution and development of vertebrate cranial lateral lines
Biological Reviews, EarlyView.ABSTRACT Lateral lines are placodally derived mechanosensory systems on the heads and trunks of many aquatic vertebrates. There is evidence of lateral lines in the earliest known vertebrate fossils, and they exist in organisms with widely different craniofacial morphologies – including the presence or absence of jaws, external or internal nostrils, and
Vishruth Venkataraman +3 more
wiley +1 more source
High resolution carbon isotope stratigraphy of the basal Silurian stratotype (Dob's Linn, Scotland) and its global correlation [PDF]
, 1997 Since its designation as the Global Stratotype Section and Point (GSSP) for the base of the Silurian System, the choice of Dob's Linn, Southern Scotland, has received criticism due to the difficulties of relating its well constrained graptolite ...
Brenchley, P.J. +3 more
core +1 more source
Groundwater, EarlyView.Abstract We propose that a new term, aquitardifer, be added to the hydrogeologic nomenclature. Aquitardifer, a blend of the terms aquitard and aquifer, accounts for geologic materials that have properties of both as traditionally defined. Several examples of aquitardifers are provided, as is justification for and applicability of the term.
Anthony C. Runkel, Jessica R. Meyer
wiley +1 more source
Regional geochemical and geophysical surveys in the Berwyn Dome and adjacent areas, north Wales [PDF]
, 1984 This report describes stream sediment and gravity surveys carried out across the Berwyn Dome and adjacent areas. The gravity survey confirmed the presence of a broad regional Bouguer anomaly low in the central part of the Dome, on which is ...
Cooper, D.C., Cornwell, J.D., Rollin, K.
core
Ar-40/Ar-39 dating of mesothermal, orogenic mineralization in a low-angle reverse shear zone in the Lower Palaeozoic of the Anglo-Brabant fold belt, Belgium [PDF]
, 2002 A
Boven, A., Dewaele, Stijn, Muchez, Ph.
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Tracking Sediment Mixing Along the Lower Danube River From the Carpathians to the Black Sea
Terra Nova, EarlyView.ABSTRACT We use detrital zircon U–Pb geochronology as a sediment provenance tracer in modern river sands to better understand how tectonic, climatic, and anthropogenic processes modulate sediment transport dynamics of the Carpathians to the Black Sea source to sink system.
Iulian Pojar +5 more
wiley +1 more source