Cambrian

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Related to Cambrian era: Cambrian Explosion, Precambrian era

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 ?
This ancient gene family probably first appeared in the genomes of sea-dwelling creatures prior to the Cambrian era about 542-million years ago.
Researchers have claimed that the sandstone found at the mines in the region date back to about 600 million years, which would put the fossil in the Ediacaran age, just before the Cambrian era that saw an explosion in the evolution of species.
The varietal thrives in Victoria's Heathcote region, which is renowned for its rich, deep-red soil, the product of a 500-million-year metamorphosis since the Cambrian era.
At the time, Indian geologist Dr Rafat Azmi reported finding small, shell-like fossils, which were typical of those that date to the Cambrian era about 500 to 600 million years ago.