Examlex
A normally distributed random variable has a mean of zero and a standard deviation of one.
Isotopic Age
The determination of the age of a mineral, rock, or geologic event based on the ratio of parent isotopes to daughter isotopes within a given system.
Geologic Timescale
A dating system used chronologically by geologists and other scientists to detail the timing and relationships of historical events on Earth.
Unconformity
A geological feature that represents a gap in the geological record, marking a period where deposition stopped, eroded, then resumed.
Mesozoic
A geological era that spanned from about 252 to 66 million years ago, including the Triassic, Jurassic, and Cretaceous periods.
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