อภิธานศัพท์บรรพชีวินวิทยา

Index Fossil

A fossil of an organism that lived for a short, well-defined time period and is …

Superposition

The principle that in undisturbed rock sequences, lower layers are older than upper layers. This …

Taphonomy

The study of what happens to organisms after death, including decay, burial, and fossilization processes. …

Unconformity

A surface representing a gap in the geological record where erosion or non-deposition occurred. Unconformities …

K-Pg Boundary

The geological boundary marking the Cretaceous-Paleogene mass extinction 66 million years ago. An asteroid impact …

Formation

A distinct rock unit with consistent characteristics, often named for the location where it was …

Iridium Anomaly

An unusually high concentration of the element iridium in geological layers corresponding to the K-Pg …

Impact Winter

The hypothesized period of global cooling following the Chicxulub asteroid impact, caused by dust and …

Lagerstätte

An exceptional fossil deposit with unusually high preservation quality or quantity. The Yixian Formation in …

Mesozoic Era

The Age of Reptiles spanning 252 to 66 million years ago. Divided into three periods: …

Radiometric Dating

Methods using the decay of radioactive isotopes to determine the absolute age of rocks and …

Assemblage Zone

A stratigraphic interval characterized by a specific combination of fossil taxa. Dinosaur assemblage zones help …

Biostratigraphy

The use of fossil organisms to date and correlate rock layers. Index fossils that lived …

Correlation

The process of matching rock layers of the same age from different locations. Paleontologists use …

Facies

A body of rock with characteristic features reflecting the environment in which it was deposited. …