Jurassic

:For the hip hop group see Jurassic 5.

Related Topics:
Hip hop - Jurassic 5

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The Jurassic period is a major unit of the geologic timescale that extends from about 200 million years BP at the end of the Triassic to 146 million years BP at the beginning of the Cretaceous. As with other geologic periods, the rock beds that define the start and end of the period are well identified, but the exact dates are uncertain by 5 - 10 million years. The Jurassic constitutes the middle period of the Mesozoic era, also known as the Age of Dinosaurs. The start of the period is marked by the major Triassic-Jurassic extinction event.

Related Topics:
Geologic timescale - BP - Triassic - Cretaceous - Mesozoic - Dinosaur - Triassic-Jurassic - Extinction event

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The Jurassic was named by Alexandre Brogniart for the extensive marine limestone exposures of the Jura Mountains in the region where Germany, France and Switzerland meet.

Related Topics:
Alexandre Brogniart - Limestone - Jura Mountains - Germany - France - Switzerland

~ ~ ~ ~ ~ ~ ~ ~ ~ ~