Results 91 to 100 of about 58,643 (272)

A geological fence diagram for England and Wales [PDF]

open access: yes, 2012
This report contains a brief description of the data and methodology used to compile the National Geological Fence Diagram (NGFD). The NGFD comprises a network of intersecting geological cross-sections covering England and Wales, to a minimum depth of
Ambrose, K.   +7 more
core  

Using Environmental Tracers to Reduce Uncertainty in Natural Flood Management Modeling

open access: yesWater Resources Research, Volume 62, Issue 5, May 2026.
Abstract Natural flood management (NFM) is a nature‐based solution that has grown in importance within flood risk policy and management over the last two decades. There is limited evidence on nature‐based solutions' effectiveness, and no accepted best practice on forecasting their performance. To explore NFM effectiveness, we built a hydrological model
Sarah L. Collins   +5 more
wiley   +1 more source

Garnet–Clinopyroxene Double‐Layered Coronae in a Metagabbronorite From the High‐Grade Metamorphic Gföhl Unit, Moldanubian Zone

open access: yesJournal of Metamorphic Geology, Volume 44, Issue 4, Page 311-336, May 2026.
ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum   +5 more
wiley   +1 more source

Fracture characteristics and stress disturbance analysis for well optimization of Silurian in Shunbei area, central Tarim Basin

open access: yesShiyou shiyan dizhi
The complex tectonic stress in the Shunbei area of the central Tarim Basin results in varied patterns of multilayered fractures. When drilling into the Silurian fracture zone and the formation pressure is lower than the drilling fluid column pressure ...
Laiyuan WANG   +4 more
doaj   +1 more source

A Silurian sea spider

open access: yesNature, 2004
Pycnogonids (sea spiders) are marine arthropods numbering some 1,160 extant species. They are globally distributed in depths of up to 6,000 metres, and locally abundant; however, their typically delicate form and non-biomineralized cuticle has resulted in an extremely sparse fossil record that is not accepted universally.
Siveter, Derek J.   +3 more
openaire   +4 more sources

Comparison of Periglacial Block Fields and Talus Slopes in South-Central Pennsylvania and Northern Maryland

open access: yes, 2019
Relict periglacial boulder fields, or block fields, are scattered across south-central Pennsylvania and northern Maryland (e.g. Potter and Moss, 1968; Denn et al 2018).
Principato, Sarah M.   +2 more
core   +1 more source

Fascinating single‐cell red algae: models for evolution and adaptation

open access: yesNew Phytologist, Volume 250, Issue 3, Page 1424-1437, May 2026.
Summary The unicellular red algae, Cyanidiophyceae, that diverged early during Archaeplastida (algal and plant) evolution, occupy a variety of extreme habitats that are inhospitable for most other eukaryotes. With the use of modern genomics and genetics methods, Cyanidiophyceae show a remarkable taxonomic diversity, share haplodiplophasic life cycles ...
Frédéric Berger   +13 more
wiley   +1 more source

High palaeolatitude (Hodh, Mauritania) recovery of graptolite faunas after the Hirnantian (end Ordovician) extinction event [PDF]

open access: yes
Marine shales directly overlying lower Hirnantian (uppermost Ordovician) glacially related sediments in Mauritania (North-West Africa) have produced a rich graptolite fauna spanning the Ordovician-Silurian boundary in an area of high palaeolatitude.
Deynoux, M.   +2 more
core  

Interstipe webbing in the Silurian graptolite Cyrtograptus murchisoni and its palaeobiological significance. [PDF]

open access: yes, 1995
Although it has long been recognized that the Graptoloidea constituted a diverse group of planktic organisms, the precise hydrodynamics of the various colony morphotypes has been a source of debate.
Underwood, Charlie J.
core  

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