Fossilized dinosaur eggshells may hold the key to determining when surrounding rocks and fossils were buried. A study published in Nature Communications Earth & Environment reports that uranium-lead ...

“This study demonstrates that eggshell biocalcite from non-avian dinosaurs, birds, and other egg-laying vertebrates has the ...

The fossilized skull of a pliosaur. Credit: Paleontological Research Center at Villa de Leyva Fossils of an extinct species of marine turtle (Desmarochelys padilla) from the Early Cretaceous in ...

Introduction -- Purpose -- Geology of the Horseshoe Canyon Formation. Ash beds ; Coal seam or zone markers ; Palynology ; Palaeo-magnetostratigraphy -- Types of preservation and methods of study.

A blade of bone lay half-buried in Saharan sand, shaped like a scimitar and tall enough to confuse the people who picked it ...