Cambrian

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Related to Cambrian fauna: Cambrian Mountains

Cambrian

of, denoting, or formed in the first 65 million years of the Palaeozoic era, during which marine invertebrates, esp trilobites, flourished

Cambrian

[′kam·brē·ən]
(geology)
The lowest geologic system that contains abundant fossils of animals, and the first (earliest) geologic period of the Paleozoic era from 570 to 500 million years ago.
References in periodicals archive ?
Members of the Cambrian fauna are ubiquitous across the shelf during the Cambrian Period but become progressively more restricted to outer shelf and basinal habitats during the Ordovician, when the Paleozoic fauna diversifies and becomes dominant in shelf environments (see Sepkoski 1991b, 1992).
1995); moreover, lingulid brachiopods, remnants of the Cambrian fauna, dwell even today in tropical intertidal settings.