Results 51 to 60 of about 4,839,080 (222)
Journal of Quaternary Science, EarlyView.ABSTRACT An understanding of the terrestrial extent, retreat dynamics and climate–glacier coupling of ice masses during the Last Glacial Termination (LGT, ~18–11 ka) is often limited by a fragmentary geomorphological record and is dependent on precise, accurate and robust dating frameworks.
Alastair M. Curry +3 more
wiley +1 more source
The Lower Devonian Water Canyon formation of Northeastern Utah [PDF]
, 1963 In 1948 Williams subdivided the Jefferson Formation of northeastern Utah into two formations. The upper formation was referred to as the Late Devonian Jefferson Formation and the lower formation the Early Devonian Water Canyon Formation (Williams, 1948 ...
Taylor, Michael E.
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地质科技通报, 2022 The Frasnian-Famennian extinction in the late Devonian was one of the largest mass extinction during Earth's history, which was believed to be caused by the plant landing-indued intensification of terrestrial chemical weathering and the consequent ...
Faliang Deng +4 more
doaj +1 more source
Internal Structure, Kinematics, and Prehistory of Frozen Debris Lobe‐A (FDL‐A), Brooks Range, Alaska
Permafrost and Periglacial Processes, EarlyView.ABSTRACT Frozen Debris Lobe‐A (FDL‐A)—one of hundreds of FDLs in the Brooks Range of northern Alaska—is a slow‐moving landslide in permafrost that has been the subject of research since 2008 due to its close proximity to the Dalton Highway. Here, we synthesize more than a decade's worth of climate and surface measurements of monitored FDLs, and the ...
Margaret M. Darrow +2 more
wiley +1 more source
Boreas, EarlyView.The glacierized Valle Frías in Northern Patagonia is one of the best‐studied valleys in South America and includes varved sediments from Lago Frías. We complement this lacustrine record with a high‐resolution documentation of varve counts and their composition.
Bernd Zolitschka +6 more
wiley +1 more source
The cyathaspids of the Red Bay Group (Lower Devonian) of Spitsbergen
Polar Research, 1983 Description and validation of the cyathaspids (Vertebrata, Heterostraci) from the Red Bay Group of Spitsbergen, previously introduced and/or described by Kim (1930, 1932) and Kiax & A. Heinz (1935). The following species are defined: Dinaspidella robusta; Irregularempis hoeli, I. mirabilis n. sp. ; Poraspis Polaris, P. breuis, P.
ALAIN BLIECK, NATASCHA HEINTZ
openaire +1 more source
Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology
Geostandards and Geoanalytical Research, EarlyView.Key Points Evaluated six natural mica reference materials for in situ LA‐ICP‐MS/MS Rb‐Sr geochronology using geochemical, microstructural and isotopic characterisation. Identified robust primary reference materials: Mount Dromedary biotite (99.37 Ma) and Mica‐Fe biotite (307.75 Ma). La Posta biotite and Högsbo muscovite are suitable secondary reference
Hugo K.H. Olierook +38 more
wiley +1 more source
High-resolution isotope stratigraphy of the Lower Devonian.
, 1996 A new data set of 53 $\sp‡$Sr/$\sp†$Sr ratios for the Lower Devonian has been collected from well preserved, and stratigraphically well constrained, brachiopod shells from the Leon region in Spain, western Urals in Russia, Podolia in ...
Ala, Davin.
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Insect Conservation and Diversity, EarlyView.Myrmecophilous Phengaris nausithous and P. teleius are highly specialized grassland butterflies and flagship species for European nature conservation, but they exhibit ongoing population declines. We show strong declines for both species in the Westerwald mountain range, western Germany, since 1994, driven by inappropriate timing of mowing, grassland ...
Klaus Fischer +10 more
wiley +1 more source
Proposal name: Lower Brule shoreline stabilization project
, 2021 Report to Congress for Future Water Resources Development (WRRDA 7001) Submission Package Proposal Name: Lower Brule Shoreline Stabilization Project Submission Date: 08/08/2017 Proposal ID Number: 90af1465-7755-46be-b204-fb0e785719a9 Purpose of Proposal:
Lower Brule Sioux Tribe of the Lower Brule Reservation, South Dakota
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