The Cambrian In a study published in July, researchers from the University of Cambridge announced a first-of-its-kind discovery of thousands of microscopic fossils from the Cambrian period unearthed from the Grand Canyon’s walls. The Cambrian ( / ˈkæmbri. During these ice ages, the decrease in global temperature led to mass extinctions. 4 million years ago. It is the first division of the Paleozoic Era (542Ma -251Ma). [1] Cambrian Period, earliest time division of the Paleozoic Era, extending from 538. [5] The Cambrian lasted 51. Learn more about a time period marked by an intense burst of evolution. ən, ˈkeɪm -/ KAM-bree-ən, KAYM-) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. Jan 22, 2025 · The Cambrian Period marks an important point in the history of life on Earth; it is the time when many kinds of invertebrates and the first vertebrates—fishes—appeared in the fossil record.

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