Angiosperms first appeared in northern Gondwana during the Early Cretaceous,
approximately 135 million years ago. Several authors have hypothesised that the origin of …

Following our traditional concept of Mammalia, and thus including a number of forms known
only by fossils of the Mesozoic, the earliest mammals are from the Late Triassic, a bit over …

The integration of terrestrial carbonate δ 13 C chemostratigraphy and radiometric dates is
opening a new window into the continental paleoclimate dynamics of the major carbon cycle …

Abstract The Late Cretaceous was a time of tremendous global change, as the final stages
of the Age of Dinosaurs were shaped by climate and sea level fluctuations and witness to …

In late Mesozoic time, the southern Cordilleran foreland basin was bounded on the west by
the Sevier thrust belt and on the south by the Mogollon highlands. Paleocurrent indicators in …

Sinuous ridges are important landforms on the surface of Mars that show promise for
quantifying ancient martian surface hydrology. Morphological similarity of these ridges to …

Body size is of fundamental importance in understanding macroevolutionary patterns, both
for extant taxa and for those with a fossil record. In this paper we describe four different kinds …

ABSTRACT The Cedar Mountain Formation in east-central Utah preserves three distinct
dinosaur-dominated vertebrate faunas in strata separated by unconformities. The oldest …

Background Basal iguanodontian dinosaurs were extremely successful animals, found in
great abundance and diversity almost worldwide during the Early Cretaceous. In contrast to …

The discovery of numerous bones and armor of a new genus of ankylosaur closely related to
the British Polacanthus Owen in the Yellow Cat Member of the Cedar Mountain Formation of …