According to the geologic time scale, which of the following statements is NOT true?

The statement regarding the Cambrian Explosion occurring after the Jurassic Period is not true because the Cambrian Explosion is a significant event that marks the rapid diversification of life on Earth, occurring at the beginning of the Paleozoic Era, specifically around 541 million years ago. In contrast, the Jurassic Period is part of the Mesozoic Era, which takes place much later, beginning around 201 million years ago. This places the Cambrian Explosion well before the Jurassic Period in the geologic time scale.

The other statements provided are accurate: the Jurassic Period indeed follows the Triassic Period, establishing a correct sequence in the Mesozoic Era. The Paleozoic Era does precede the Mesozoic Era, as recognized in the geologic timeline that outlines Earth's history. Finally, the Cenozoic Era is indeed the most recent of the three major eras, which include the Paleozoic, Mesozoic, and Cenozoic. This correct chronological progression is crucial for understanding the sequence of geological and biological events in Earth's history.