Trilobites are most characteristic of which geologic period?

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Study for the ASBOG Fundamentals of Geology exam. Access flashcards, multiple-choice questions, and understand key geologic principles. Prepare confidently for your exam!

Multiple Choice

Trilobites are most characteristic of which geologic period?

Explanation:
Trilobites first appear and diversify during the early Cambrian, right in the period known for the Cambrian explosion of life. Their fossils become widespread and abundant in Cambrian seas, making them a distinctive and recognizable feature of rocks of that age. Because of this very strong association, trilobites are used as classic indicators of Cambrian strata. While they do continue into later periods, their most emblematic and widespread presence is in the Cambrian, so that period is the best match.

Trilobites first appear and diversify during the early Cambrian, right in the period known for the Cambrian explosion of life. Their fossils become widespread and abundant in Cambrian seas, making them a distinctive and recognizable feature of rocks of that age. Because of this very strong association, trilobites are used as classic indicators of Cambrian strata. While they do continue into later periods, their most emblematic and widespread presence is in the Cambrian, so that period is the best match.

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