Results 21 to 30 of about 115,566 (343)

Devonian Tentaculitoids from Brazil: extinction and stratigraphic distribution

open access: yesTerr@ Plural, 2021
The class Tentaculitoidea is an extinct group composed of small carbonate coniform-shaped invertebrates, distributed from Ordovician to Devonian. This group is more often recorded to the North Hemisphere, being less recorded to South Hemisphere deposits.
Jeanninny Carla Comniskey   +5 more
doaj   +1 more source

Organic-walled tentaculids of Late Devonian (Frasnian) deposits of the Appalachian and Michigan Basins, Laurussia (NY, MI, OH)

open access: yesGeologica Acta, 2022
This is the first report of organic-walled tentaculid remains from Givetian through Frasnian age deposits of the Michigan and Appalachian Basins in western Laurussia.
Kimberly C. Meehan, James T. Boyle
doaj   +1 more source

A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms

open access: yesActa Palaeontologica Polonica, 2023
Sarcopterygian remains are relatively common in the so-called “Placoderm Sandstone” (storm-origin bone-bearing breccia) from the Emsian (Lower Devonian) of Podłazie in the Holy Cross Mountains (Poland).
OLGA WILK
doaj   +1 more source

Echinoderms of the Iowa Devonian [PDF]

open access: hybridIowa Geological Survey Annual Report, 1921
Reprinted from the Iowa Geological Survey. Annual reports, 1919-1920. ; Mode of access: Internet.
A. O. Thomas
openalex   +4 more sources

Dolocretes in the uppermost Famennian to Mississippian siliciclastic deposits (Šķervelis Formation, Latvia) [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Siliciclastic deposits and dolostones of the Å Ä·ervelis Formation in southwestern Latvia were studied in outcrops, polished slabs, thin sections, and by geochemical methods, including stable isotope analyses.
Daiga Pipira   +4 more
doaj   +1 more source

Was the Devonian placoderm Titanichthys a suspension feeder? [PDF]

open access: yesRoyal Society Open Science, 2020
Large nektonic suspension feeders have evolved multiple times. The apparent trend among apex predators for some evolving into feeding on small zooplankton is of interest for understanding the associated shifts in anatomy and behaviour, while the spatial ...
Samuel J. Coatham   +3 more
doaj   +1 more source

Palaeozoic correlations and the Palaeogeography of the Sibumasu (Shan-Thai) Terrane - a brief review [PDF]

open access: yesResearch & Knowledge, 2016
Furongian sandstones yield shallow-water trilobite faunas along the length of the Sibumasu Terrane in the four regions of NW Malaysia (Langkawi), southern Thailand (Satun), the Shan States of Myanmar and the Baoshan Block of western Yunnan.
Clive Burrett   +2 more
doaj   +1 more source

New information on Brindabellaspis stensioi Young, 1980, highlights morphological disparity in Early Devonian placoderms [PDF]

open access: yesRoyal Society Open Science, 2018
Acid-prepared specimens of the placoderm Brindabellaspis stensioi (Early Devonian of New South Wales, Australia) revealed placoderm endocranial anatomy in unprecedented detail.
Benedict King   +2 more
doaj   +1 more source

Middle–Late Devonian conodont fauna of the Bahram Formation in the Shahzadeh Mohammad section, North of Kerman [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2021
Devonian deposits of the Bahram Formation with a thickness of 300 m were studied based on conodont fauna in Shahzadeh Mohammad section (33 km east of Zarand, 95 km north of Kerman city) in central Iran structural Zone.
Fattaneh Zamani   +5 more
doaj   +1 more source

The Coral-Rich Devonian Limestones of the English Riviera UNESCO Global Geopark [PDF]

open access: yesGeoconservation Research, 2021
The coral-rich limestones of the English Riviera UNESCO Global Geopark were an important component of the original definition of the Devonian System, introduced by Sedgwick and Murchison in 1840.
Malcolm Hart, Christopher Smart
doaj   +1 more source

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