The Calcium Isotope (δ^44/40Ca) Record Through Environmental Changes: Insights From the Late Triassic

Interpreting the Upper Triassic Carbon Isotope Record

Geohistory Analysis of the Tabas Block (Abdoughi-Parvadeh Basins) as Seen from the Late Triassic through Early Cretaceous Subsidence Curves

The study area is situated in the Middle part of the Tabas Block. It contains outcrops of rocks that formed along longitudinal faults in Early Cimmerian orogenic phase. The basin subsided along these faults from the Late Triassic to Early Cretaceous, which include two sedimentary cycles. A sedimentary cycle, related to Upper Triassic to Bajocian is known as Shemshak group. Another sedimentary c...

Assessing the record and causes of Late Triassic extinctions

Accelerated biotic turnover during the Late Triassic has led to the perception of an end-Triassic mass extinction event, now regarded as one of the ‘‘big five’’ extinctions. Close examination of the fossil record reveals that many groups thought to be affected severely by this event, such as ammonoids, bivalves and conodonts, instead were in decline throughout the Late Triassic, and that other ...

Osmium isotope evidence for a large Late Triassic impact event

Anomalously high platinum group element concentrations have previously been reported for Upper Triassic deep-sea sediments, which are interpreted to be derived from an extraterrestrial impact event. Here we report the osmium (Os) isotope fingerprint of an extraterrestrial impact from Upper Triassic chert successions in Japan. Os isotope data exhibit a marked negative excursion from an initial O...

Rapid Communication First Record of Erpetosuchus (reptilia: Archosauria) from the Late Triassic of North America

PAUL E. OLSEN1, HANS-DIETER SUES2, and MARK A. NORELL3 1Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964; 2Department of Palaeobiology, Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario, Canada M5S 2C6 and Department of Zoology, University of Toronto, Toronto, Ontario, Canada M5S 3G5; 3Division of Paleontology, American Museum of Natural History, Central P...