Results 51 to 60 of about 3,037 (183)

PERIODIZING GEOLOGICALLY OUTWITH (AND WITHOUT?) THE ANTHROPOCENE: PASTS, AGENCIES, AND THE TERRESTRIAL

History and Theory, EarlyView.
ABSTRACT As a periodization that is generally understood to refer to an era of Terrestrial relationships that developed with modernization and nuclearization, the Anthropocene cannot be applied simply to premodern histories and texts. However, it has introduced historians to geological periodization as a mode of describing periods of changed ...
Gwenffrewi J. Morgan
wiley   +1 more source

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

Journal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi, Alan P. Heward, Lorraine B. Eglinton, Steve R. Packer, Darrin T. Stead   +4 more
wiley   +1 more source

Bryozoan–cnidarian mutualism triggered a new strategy for greater resource exploitation as early as the Late Silurian

Scientific Reports, 2022
Bryozoans were common benthic invertebrates in the Silurian seas. The large biodiversity among Silurian benthic organisms prompted diversified interactions, and as a result bryozoans hosted many other organisms as symbionts.
Mikołaj K. Zapalski, Olev Vinn, Ursula Toom, Andrej Ernst, Mark A. Wilson   +4 more
doaj   +1 more source

Recognition of fossil keratose sponges in carbonates using petrographic and machine‐learning classification

Sedimentology, EarlyView.
ABSTRACT Filamentous, anastomosing spar‐filled networks in Phanerozoic carbonates have been interpreted as the mineralised remains of keratose (non‐spiculate) sponges, yet their recognition remains contested because fabrics of broadly similar appearance may arise from microbial, diagenetic or physical processes. This study combines direct fossil–modern
Jeong‐Hyun Lee, Seung‐Sep Kim, Cui Luo   +2 more
wiley   +1 more source

Paleogeography of the Pechora-Barents Sea paleobasins in the Late Ordovician-Early Devonian [PDF]

Нефтегазовая геология: Теория и практика
Modern studies have made it possible to clarify and detail the overall picture of paleogeographic development and establish the basic patterns of the structure of Upper Ordovician-Lower Devonian sedimentary column in the Pechora-Barents Sea megabasin ...
Taninskaya N.V., Vasil'ev N.Ya., Myasnikova M.A., Zel'tser V.N., Merkulova A.N., Grislina M.N., Nizyaeva I.S.   +6 more
doaj  

Geochemical features of the Lower Silurian strata in Xiushan, Chongqing: Implications for paleoclimate reconstruction

Journal of Asian Earth Sciences: X
The Silurian was featured by frequent climatic and environmental changes. Impoverished marine faunas slowly recovered from the end-Ordovician mass extinction.
La Zhang, Yang Chen, Jinhua Luan, Ruigang Zhang, Zhiwei Cui, Haitong Zhao, Qian Wang   +6 more
doaj   +1 more source

Age and orbital forcing in the upper Silurian Cellon section (Carnic Alps, Austria) uncovered using the WaverideR R package

Frontiers in Earth Science
The type-Silurian Cellon section in the Carnic Alps in Austria underpins much of the current Silurian conodont zonations, forming the basis for the Silurian timescale.
Michiel Arts, Carlo Corradini, Monica Pondrelli, Monica Pondrelli, Damien Pas, Anne-Christine Da Silva   +5 more
doaj   +1 more source

The Silurian plants [PDF]

Proceedings of the Geologists' Association, 1904
n ...
openaire   +1 more source

Novel evidence for the youngest Naraoia and a reassessment of naraoiid paleobiogeography [PDF]

Fossil Record
Naraoiids are nektaspidid arthropods that display two exoskeletal shields, typically lack thoracic tergites, and have an exceptional Cambrian diversity. Despite their predominantly Cambrian fossil record, Naraoia species have been documented in deposits ...
Russell D. C. Bicknell, Aaron Goodman, Lukáš Laibl, Lisa Amati   +3 more
doaj   +3 more sources

A sparsely encrusted hardground with abundant Trypanites borings from the Llandovery of the Velise River, western Estonia (Baltica) [PDF]

Estonian Journal of Earth Sciences, 2016
The Päärdu hardground from the Telychian (Rumba Formation) of western Estonia is sparsely encrusted (0.4% of the studied surface) by possible tabulate corals, sheet-like bryozoans and discoidal echinoderm holdfasts.
Olev Vinn, Ursula Toom
doaj   +1 more source