Results 141 to 150 of about 10,069 (268)

Geochemistry of phenanthrenes, dibenzothiophenes and aromatic steroids in the Bazhenov formation’s source rock of the south-east of Western Siberia (Tomsk region)

Georesursy
The paper presents the results of studying aromatic compounds (phenanthrenes, dibenzothiophenes, aromatic steroids) in source rock extracts (bitumoids) from the Bazhenov Formation of the Tomsk Region (south-east of Western Siberia, Russia).
I. S. Sotnich, E. A. Kostyreva
doaj   +1 more source

The White Stone Band of the Kimmeridge Clay Formation, an integrated high resolution approach to understanding environmental change

, 2004
The Kimmeridge Clay is a Jurassic mudrock succession that shows Milankovitch Band climatic cyclicity. A key issue is to determine how the subtle changes that define this cyclicity result from climatic change.
Marshall, J.E.A., Kemp, A.E.S., Pearson, S.J.   +2 more
core  

Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner, Robert Schöner, Reinhard Gaupp, Andreas Kronz, Benjamin Bomfleur, Joerg W. Schneider, Lothar G. Viereck   +6 more
wiley   +1 more source

A new palaeospinacid shark (Chondrichthyes, Neoselachii) from the upper jurassic of Southern Germany

, 2009
The Palaeospinacidae are a highly diverse clade (< 30 species) within the Synechodontiformes, which are considered to be a monophyletic group of basal galeomorph sharks. Four genera, Macrourogaleus, Paraorthacodus, Palidiplospinax, and Synechodus, are
Klug, S, Klug, Stefanie
core   +1 more source

Accumulation stages and model of tuff gas reservoir: a case study of Huoshiling Formation in Dehui Fault Depression, Songliao Basin

Shiyou shiyan dizhi
The tuff gas reservoir in the Upper Jurassic Huoshiling Formation of the Dehui Fault Depression, Songliao Basin is expected to become the first tuff gas reservoir with industrial development value in China.
Wentian FAN, Zhenchang JIANG, Xin ZHANG, Zhizhang WANG, Huixi LIN, Guili YANG, Sirui CHEN, Jingyi WANG, Dingye ZHENG   +8 more
doaj   +1 more source

New craniodental materials of Falcarius utahensis (Theropoda: Therizinosauria) reveal patterns of intraspecific variation and cranial evolution in early coelurosaurians

The Anatomical Record, Volume 309, Issue 8, Page 1995-2048, August 2026.
Abstract Despite documented ecomorphological shifts toward an herbivorous diet in several coelurosaurian lineages, the evolutionary tempo and mode of these changes remain poorly understood, hampered by sparse cranial materials for early representatives of major clades. This is particularly true for Therizinosauria, with representative crania best known
William J. Freimuth, Lindsay E. Zanno
wiley   +1 more source

Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade

Biological Reviews, Volume 101, Issue 4, Page 1760-1778, August 2026.
ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan, Case Vincent Miller, Michael Pittman   +2 more
wiley   +1 more source

Biostratigraphical study of the Middle-Upper Jurassic ammonite association of Stretta Arancio’s section (Southern Sicily, Italy).

, 2013
This stratigraphical study is part of the revision work that has been carried out for the last ten years on some Jurassic successions outcropping in Southwestern Sicily.
DI STEFANO, Pietro, D'ARPA, Carolina, CUSUMANO, Antonio   +2 more
core  

Comparative endocranial anatomy in the crocodylians Leidyosuchus canadensis and Stangerochampsa mccabei from the upper Cretaceous of Alberta, Canada

Journal of Anatomy, Volume 249, Issue 2, Page 264-291, August 2026.
Leidyosuchus canadensis and Stangerochampsa mccabei share endocranial features such as posterior projection of a neurovascular canal in the maxilla and a paratympanic sinus system most similar to those of small‐bodied and young extant crocodylians, suggesting that these pedomorphic features may reflect the ancestral crocodylian condition.
G. Donzé, G. Perrichon, P. Vincent, F. Therrien, J. E. Martin   +4 more
wiley   +1 more source

Magnetic polarity zonation and European paleomagnetic poles for the Upper Jurassic

, 2008
The goal of this research was to resolve some important questions about stratigraphy and tectonics of the Upper Jurassic, a fascinating period in the history of our planet.
Przybylski, Piotr A
core