Results 31 to 40 of about 9,274 (231)

Rediscovery of the Type Specimens of the Sarcopterygian Fishes Onychodus sigmoides and Onychodus hopkinsi from the Devonian of Ohio, USA

open access: yesDiversity
John Strong Newberry described three species of the lobe-fin fish Onychodus (Osteichthyes, Sarcopterygii, Onychodontida) based on parasymphysial teeth, or tusks.
Loren E. Babcock
doaj   +1 more source

The geochemical characteristics, distribution of marine source rocks and gas exploration potential in the northwestern Sichuan Basin, China

open access: yesJournal of Natural Gas Geoscience, 2021
In recent years, the northwestern part of the Sichuan Basin has become a popular location for natural gas exploration. However, up to this point, the geochemical characteristics and distribution of marine source rocks in this area have not been ...
Guoyi Hu   +4 more
doaj   +1 more source

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

open access: yesThe Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source

Middle to upper Devonian (givetian and frasnian) shallow-water carbonates of Western Europe: fades analysis and cyclicity [PDF]

open access: yes, 1997
The Middle and Upper Devonian (Givetian-Frasnian) shallow-water carbonate facies of western Europe were deposited as a large-scale transgressive succession over continental facies of the Old Red Continent.
Garland, Joanna
core  

THE SEISMIC EXPRESSION OF MIDDLE TO UPPER DEVONIAN REEF COMPLEXES, CANNING BASIN [PDF]

open access: yes, 1990
This paper describes the unique seismic character of the Middle to Upper Devonian Pillara Limestone buildups as seen on seismic data acquired in the area northeast of the Pillara Ranges in the northern Canning Basin.
G.J. Kemp, B.L. Wilson
core   +1 more source

Hidden Middle Devonian Magmatism of North-Eastern Siberia: Age Constraints from Detrital Zircon U–Pb Data [PDF]

open access: yes, 2020
We present new data on the tectonic evolution of north-eastern Siberia using an integrated provenance analysis based on U–Pb detrital zircon dating and sandstone petrography of Devonian sedimentary strata.
Victoria B. Ershova   +2 more
core   +1 more source

An assessment of the groundwater resources based on infiltration recharge hydrogeological modeling

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2016
An assessment of the natural groundwater resources (GWR) of Devonian (middle and upper Famennian) aquifer was made in the area of research-assessment works for Smolensk city water supply.
S. O. Grinevskiy   +2 more
doaj   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

open access: yesThe Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro   +1 more
wiley   +1 more source

Reservoir characterization and potential of the old red sandstone around the inner moray firth, NE Scotland [PDF]

open access: yes, 1993
Old Red Sandstone deposition in North East Scotland occurred during Devonian times within the Orcadian Basin, a northeast-southwest elongated structure. The basin formed in an extensional tectonic regime that resulted from gravitational collapse of over ...
Forbes, Douglas
core  

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

open access: yesDeep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski   +4 more
wiley   +1 more source

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