Results 71 to 80 of about 1,129 (198)
Papers in Palaeontology, Volume 10, Issue 5, September/October 2024.Abstract New Floian and early middle Darriwilian brachiopod assemblages of the San José Formation of the Eastern Cordillera of Peru are presented. A new genus and species, Apurimella santiagoi, and two new species, Phragmorthis henrylunae and Nocturnellia ashaninka, are described.
Jorge Colmenar +2 more
wiley +1 more source
Late Ordovician (Katian) Graptolites and Shelly Fauna from the Phu Ngu Formation, North-East Vietnam
, 2021 Two new graptolite assemblages are identified from discrete intervals within the Phu Ngu Formation, Na Ri District, Bac Kan Province, north-east Vietnam. The graptolites occur in laminated mud/siltstones thought to be distal turbidite deposits.
C Stocker (8718573) +11 more
core +3 more sources
Palaeontology, Volume 67, Issue 2, March/April 2024.Abstract Strophomenoid brachiopods had thin, concavo‐convex shells, were ubiquitous colonizers of Palaeozoic muddy seafloors, and are hypothesized to have filter‐fed in a concave‐upward orientation. This orientation would elevate their line of commissure out of potentially lethal lophophore‐clogging mud.
Benjamin F. Dattilo +7 more
wiley +1 more source
Revised stratigraphy of the middle Simcoe Group (Ordovician, upper Sandbian-Katian) in its type area: an integrated approach [PDF]
, 2019 The Upper Ordovician Bobcaygeon Formation of southern Ontario is a widespread unit that spans the Sandbian-Katian stage boundary and contains exceptionally preserved invertebrate fossil assemblages, including the famed â Kirkfield echinoderm fauna.â ...
Brett, Carlton Elliot +1 more
core +1 more source
Papers in Palaeontology, Volume 10, Issue 1, January/February 2024.Abstract An unusually rich and diverse suite of virgianid brachiopods, hitherto poorly known, is systematically described here for the first time from the Ordovician–Silurian boundary interval (late Katian – Aeronian) of North Greenland. The Late Ordovician virgianids comprise typical taxa of the warm‐water Tcherskidium fauna (e.g.
Jisuo Jin +3 more
wiley +1 more source
Orbital and Millennial‐Scale Cycles Through the Hirnantian (Late Ordovician) in Southern China
Geochemistry, Geophysics, Geosystems, Volume 25, Issue 1, January 2024.Abstract The Hirnantian period, making the end of the Ordovician with significant mass extinctions and large ice‐sheets, is a critical interval for studying paleoclimate variations. This research represents the first cyclostratigraphic study of this period, utilizing high‐resolution (1 mm sampling rate) geochemical data from the ∼7‐m thick SH‐1 drill ...
Siding Jin +5 more
wiley +1 more source
, 2010 delta C-13 values of numerous limestone samples from Katian (Upper Ordovician) successions in Oklahoma and the Upper Mississippi Valley document the presence of at least three of the four positive excursions that have been recognized in the lower-middle ...
Young, Seth +3 more
core +2 more sources
A swollen crinoid pluricolumnal from the Upper Ordovician of northern Kentucky, USA: the oldest record of an amorphous paleopathologic response in Crinoidea? [PDF]
Estonian Journal of Earth Sciences, 2014 Swollen or otherwise malformed crinoid remains are relatively common in the Phanerozoic. However, published reports typically describe swellings associated with a discrete pit, boring, embedment structure or encruster, and, moreover, are overwhelmingly ...
James R. Thomka +2 more
doaj +1 more source
The Ordovician brachiopod genus Cyrtonotella: taxonomy and distribution in the Baltic Basin [PDF]
Estonian Journal of Earth Sciences, 2019 The taxonomy of the Baltic Ordovician orthoidean brachiopods of the genus Cyrtonotella Schuchert & Cooper, 1931 is discussed, two neotypes are suggested and emended descriptions of species and subspecies are presented.
Linda Hints
doaj +1 more source