Jurassic

:For the hip hop group see Jurassic 5.

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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.

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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.

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Hip hop: Hip hop is a cultural movement that originated in the working class communities of New York City, United States, in the late 1970s. Other elements include beatboxing, hip hop fashion, and slang. Since first emerging in the South Bronx, hip hop culture has spread around the world. When hip hop music ...

Jurassic 5: Jurassic 5 is a six-piece hip hop crew that was formed in 1993 (see 1993 in music) at the Los Angeles, California venue Good Life. Chali 2na, Akil, Zaakir aka Soup, Mark 7even, and turntable maestros DJ Nu-Mark and DJ Cut Chemist came together from two separate crews, the Rebels of Rhythm and Unity...

Geologic timescale: REDIRECT Geologic time scale...