A Field ________ Is a Property That Must Be Met

question 92

Short Answer

A field ________ is a property that must be met before an entry can be accepted into the field.

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Definitions:

Cretaceous

The geological period between about 145 and 66 million years ago, the last period of the Mesozoic Era, characterized by the dominance of dinosaurs and the first appearance of flowering plants.

Pleistocene

An epoch of the Quaternary period characterized by several glacial advances, extending from about 2.58 million to 11,700 years ago.

Triassic

A geologic period and system which lasted from about 252 to 201 million years ago, marking the beginning of the Mesozoic Era.

Carboniferous

A geologic period and system that occurred around 359 to 299 million years ago, known for its vast swamp forests and the formation of significant coal deposits.