Results 61 to 70 of about 115,566 (343)

Tafofácies, correlação estratigráfica e paleoambientes em uma nova seção Devoniana na Bacia do Paraná (PR, Brasil). e2322740

open access: yesTerr@ Plural
The stratigraphic framework in the southern portion of the Paraná Basin, represented by the Devonian System strata, preserves a rich fossil deposit.
Elvio Pinto Bosetti   +6 more
doaj   +1 more source

The Class Strophomenata (Brachiopoda) in Devonian deposits from the state of Paraná: a case study

open access: yesTerr@ Plural, 2022
The Strophomenata are extinct and presumably confined to the Paleozoic Rhynchonelliformea brachiopods. The class comprises the orders Strophomenida, Productida, Orthotetida, and Billingsellida.
Gabrieli Goltz   +3 more
doaj   +1 more source

Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland [PDF]

open access: yes, 2015
Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history.
Bird, A. F.   +3 more
core   +3 more sources

Pre-Variscan palaeogeographical structures in the Cantabrian Zone, Spain: some critical considerations regarding their origin, location and significance

open access: yesGeologos, 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

Paleontological rescue, depositional environment, and stratigraphic correlation of a section of the Ponta Grossa Formation (Paraná Basin)

open access: yesTerr@ Plural, 2021
The urban area of Ponta Grossa (PR) occurs on one of the most abundant fossiliferous fields in the country, which records an endemic fauna that occurred in the Devonian of the Paraná Basin.
Elvio Pinto Bosetti   +6 more
doaj   +1 more source

The thermal history of the Western Irish onshore [PDF]

open access: yes, 2014
We present here a low-temperature thermochronological study that combines the apatite fission-track and (U + Th)/He dating methods with a pseudo-vertical sampling approach to generate continuous and well-constrained temperature–time histories from the ...
Chew, David   +2 more
core   +2 more sources

About the structure of the Kama-Kinel trough system

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
Kama-Kinel Trough System (KKTS) — the structure formed in the Frasnian of the Late Devonian in the vast territory of the Volga-Ural province, is distinguished by the Upper Devonian — Lower Carboniferous deposits.
E. N. Gorozhanina   +3 more
doaj   +1 more source

Ichnological Research of Silurian–Devonian Strata and the Zoophycos Distribution in the Paraná Basin

open access: yesTerr@ Plural, 2021
The Silurian–Devonian strata of the Paraná Basin (southern Brazil) have a wide variety of ichnofossils. The first records date from the beginning of the last century, with pioneering studies in 1912 addressing the Furnas and Ponta Grossa formations ...
Kevin William Richter   +2 more
doaj   +1 more source

Gradational development of slaty cleavage to schistosity -an example from the Iberian Pyrite Belt, Spain- [PDF]

open access: yes, 1994
The Iberian Pyrite Belt is an Upper Paleozoic succession which has been divided into the Phyllite-Quartzite Group, the Volcanic-Sliceous Complex and the Culm Group in ascending order from base to the top. The contacts among them are conformable.
Suzuki, shigeyuki
core   +1 more source

Devonian Sandstone Lithostratigraphy, Northern Arkansas [PDF]

open access: yes, 1977
Two areas of Devonian sandstone development may be recognized in northern Arkansas. In northwestern Arkansas, the Clifty Formation comprises a massively bedded, super mature quartz arenite of Middle Devonian age overlain by thinner bedded, phosphatic ...
Hall, Jeffery D., Manger, Walter L.
core   +2 more sources

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