Heat presshure melting weathering erosion compacting cementing and cooling
The Precambrian time
It fluctuates, including periodic reversals.
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Gypsum is a mineral that was formed by layers of sediment , fine particles, that were deposited over a period of time, and then subjected to geologic forces.
Arrested Development
The basic units of the geologic time scale eras and periods.
EonEraPeriodEpoch! :)
eras and periods
The geologic time scale.
Geologic Time. It's called the Geologic Time Scale.
Cenozoic is not a major period of the geologic time scale. The scale is broken down into eras. Cenozoic, Mesozoic and Paleozoic are all part of the Phanerozic era.
Phanerozoic is the eon which geologic time scale means visable life.
The two basic divisions following the Precambrian on the geologic time scale are the Paleozoic Era and the Mesozoic Era. These eras are further divided into periods, such as the Cambrian, Devonian, and Permian in the Paleozoic Era, and the Triassic, Jurassic, and Cretaceous in the Mesozoic Era.
The smallest unit of geologic time is an age, followed by epoch, period, era, eon, and super eon.
The Precambrian
in the scope of geologic time, how significant is the presence of humans?
Cenozoic