Cretaceous period

During the Ice Ages of the Quaternary Period, most of the land was covered with ice, and vegetation included mosses, sedges, shrubs, lichens and low-lying grasses. During warmer periods, most of the soil was not covered with ice, and woodlands and coniferous forests existed. The emergence of tropical rainforests occurred during the Holocene. This habitat allowed many animals and plants to thrive and evolve. Savannas also emerged where herbivores grazed and flourished.

The Cretaceous period of the Mesozoic era was the final and longest period. It occurred from 14.5 million years ago to 65.5 million years ago (Bagley). There was a minor mass extinction that marks …

Rocks gathered from the impact site provide a glimpse into the catastrophically destructive minutes and hours after the fateful strike.

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Dimetrodon and Edaphosaurus synapsids, illustration. Dimetrodon (red and yellow, foreground) existed from 295 to 272 million years ago, and Edaphosaurus (blue and yellow, background) from 300 to 280 million years ago, during the Permian.

Illustration about Silhouettes of dinosaurs of cretaceous period of mesozoic era with names. Illustration of epoch, raptor, dinosaur - 77252036

© Grebennikov Verlag, Sergey Krasovsky

Illustration of the aftermath of Cretaceous-Paleogene (K/Pg) impact event, the comet or asteroid that ended the Cretaceous Period, heralding the Palaeogene and the Cainozoic Era. Among the first plants to recover are the pteridophytes (ferns) and seedlings of trees.

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