Results 71 to 80 of about 4,379 (215)
Meteoritics &Planetary Science, Volume 61, Issue 8, Page 2103-2139, August 2026.Abstract The Ames impact structure (Oklahoma) is thought to have formed during the Ordovician Meteor Event, based on conodont biostratigraphy of its crater fill. Here, U–Pb zircon dates from its impact‐melt portion, conducted using secondary ion mass spectrometry and laser ablation–inductively coupled plasma–mass spectrometry (n = 37 spots), yield a ...
Elizabeth J. Catlos +9 more
wiley +1 more source
Papers in Palaeontology, Volume 12, Issue 4, July/August 2026.Abstract In the Csővár area of north‐central Hungary a remarkably well‐preserved Rhaetian radiolarian fauna, in which conodonts were also found, has enabled the identification of 49 radiolarian species belonging to 35 genera. The fauna is dominated by the orders Spumellaria and Entactinaria over less diverse Nassellaria.
Tim Cifer, Viktor Karádi
wiley +1 more source
High‐Resolution Anisian Marine Perturbation by Volcanism in the Eastern Paleo‐Tethys
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.Abstract Following the end‐Permian mass extinction, the Middle Triassic Anisian Stage was still characterized by environmental perturbations that hindered biological flourishing, yet it remains uncertain whether these persistent Tethyan disturbances were coupled with the closure of the Paleo‐Tethys Ocean.
Zhenyang Lai +12 more
wiley +1 more source
, 2016 Conodonts are a clade of chordates and are valuable indicator fossils for biostratigraphy. The segminiplanate (neogondolelliform) conodonts represent a major morphological group ranging from upper Carboniferous to Upper Triassic marine sediments. However,
Yanlong Chen +7 more
core +1 more source
New biostratigraphic and chemostratigraphic data from the Chicotte Formation (Llandovery, Anticosti Island, Laurentia) compared with the Viki core (Estonia, Baltica) [PDF]
Estonian Journal of Earth Sciences, 2009 Due to the lack of biostratigraphically useful graptolites in the crinoidal and reefal Chicotte Formation on Anticosti Island (Québec, Canada), the precise chronostratigraphic position of the formation is not known. New stable carbon isotope and conodont
Munnecke, Axel, Männik, Peep
doaj
Tectonics, Volume 45, Issue 7, July 2026.Abstract The accretion of allochthonous provinces, derived from oceanic plates, has traditionally been considered an important contributor to continental growth. However, increasing evidence shows that some oceanic terranes (e.g., island arcs) are not “exotic,” as suggested by the presence of continental‐derived sedimentary provenance.
Igor V. Gomes +4 more
wiley +1 more source
Palaeontology, Volume 69, Issue 4, July/August 2026.Abstract The oxygen isotope composition (δ18O) of conodont biogenic apatite is a critical proxy for reconstructing past marine temperatures and environments. This study compares δ18O values of Triassic conodonts embedded in chert with those extracted from the same samples using sodium hydroxide (NaOH), a novel alternative to traditional hydrofluoric ...
Manuel Rigo, Ian S. Williams, Shun Muto
wiley +1 more source
, 1982 Conodonts were extracted from three limestone units in westcentral Indiana: the Silverwood Limestone Member of the Staunton Formation; the Universal Limestone Member of the Dugger Formation; and from a new unit, the informally named Salt Creek limestone ...
Stanley, Sarah G.
core
, 1989 (Table 10) Distribution and abundance of conodonts in Devonian/Carboniferous boundary profile at Seiler-Schurf
Ziegler, Willi +5 more
core +1 more source
Early permian phase of morphogenesis of conodonts: comparative historial analysis
, 1992 Purpose of the work: study of the morphology of the Early Permian conodonts, their revision, determination of the phases of their historical development and specification of the zonal scheme. Full phylogenetic schemes are given for the first time for the
Reimers Alexey Nikolaevich
core