Results 41 to 50 of about 1,858 (206)

Preliminar results of paleontological salvage at Belo Monte Powerplant construction [PDF]

open access: yesBrazilian Journal of Biology, 2015
In this paper some preliminary fossil specimens are presented. They represent a collection sampled by Belo Monte’s Programa de Salvamento do Patrimônio Paleontológico (PSPP), which includes unprecedented invertebrate fauna and fossil vertebrates from ...
HZ. Tomassi   +9 more
doaj   +4 more sources

The Formation Mechanism and Geological Significance of Graptolite from the Longmaxi Formation: Constraints from in situ Multi-element Imaging Analysis

open access: yesYankuang ceshi, 2019
BACKGROUND The black shale of the Longmaxi Formation in the Upper Yangtze region is rich in graptolites. Most of them were preserved as a carbonaceous film, and enriched in organic-rich layers.
ZHU Cheng-lin   +6 more
doaj   +1 more source

The Fossil Invertebrate Holotype Specimens in the Collection of the University of Otago Department of Geology, Dunedin, New Zealand

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
The 196 invertebrate holotypes held in the University of Otago Department of Geology are catalogued in detail. A short history of the Geology Museum, notable contributors to the invertebrate collection, highlights of the collection and notes on the information provided are followed by a list of the holotypes under eight phyla: Porifera, Cnidaria ...
Jeffrey Hudson Robinson   +2 more
wiley   +1 more source

The diverse bivalved arthropods of Castle Bank (Darriwilian, Ordovician), Wales

open access: yesPapers in Palaeontology, Volume 12, Issue 5, September/October 2026.
Abstract The Darriwilian (Didymograptus murchisoni Biozone, Middle Ordovician) Castle Bank Lagerstätte, near Llandrindod, Wales (UK) hosts a diverse assemblage of marine animals, generally under 10 mm in size. Here we provide an overview of the diversity of bivalved arthropods from Castle Bank.
Stephen Pates   +3 more
wiley   +1 more source

The succession of Hirnantian events based on data from Baltica: brachiopods, chitinozoans, conodonts, and carbon isotopes [PDF]

open access: yesEstonian Journal of Earth Sciences, 2008
The Hirnantian (late Ordovician) environment was complex and dynamic. Understanding the correct order of events and their precise correlation with a time scale are extremely important for the development of different kinds of environmental ...
Kaljo, Dimitri   +3 more
doaj  

Paleomagnetic Constraints on the Separation of the Olongbuluke Block From the North China Block During the Late Cambrian–Middle Ordovician and Its Tectonic Significance

open access: yesGeophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract The collisional evolution of the micro‐blocks in the northeastern Tibetan Plateau is relatively well constrained. However, the reason why a fragment of the North China Block, the Olongbuluke Block, became separated from North China by the Central Qilian Block (a fragment of the South China Block) remains unclear.
Teng Wang   +4 more
wiley   +1 more source

The Llandovery (Silurian) conodont species diversity on the Upper Yangtze Platform, South China [PDF]

open access: yesEstonian Journal of Earth Sciences, 2014
Conodonts are one of the stratigraphically most important fossil groups in the Silurian Period. We examine the regional diversity dynamics of the Llandovery condonts on the Upper Yangtze Platform.
Zhongyang Chen   +3 more
doaj   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

open access: yesSedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti   +5 more
wiley   +1 more source

New Zealand Geological Timescale 2025

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
New Zealand Geological Timescale 2025 (NZGT 2025) is the first comprehensive update and revision of the New Zealand Geological Timescale in a decade. The criteria used to establish age ranges of New Zealand Stages within the NZGT have been reviewed, calibrated, and revised where required against the 2023/04 International Chronostratigraphic Chart and ...
Christopher D. Clowes   +13 more
wiley   +1 more source

Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana margin (Eastern Cordillera, NW Argentina)

open access: yesGeologica Acta, 2005
The Tremadocian graptolite and conodont faunas of the Gondwana Margin recorded at the Eastern Cordillera (EC) of Salta and Jujuy provinces (northwestern Argentina) are studied.
G. DEL CARMEN ORTEGA, G.L. ALBANESI
doaj   +1 more source

Home - About - Disclaimer - Privacy