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Rise of reptiles, and first dinosaurs appeared. Climate was hot and dry with strong seasons, making summers hot and winters cold. Earliest mammal evolved.
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Enormous change to biology, climate, and oceanography. Mammals, plants, insects, seas life, and birds develop to repopulate earth. Geologic changes form glaciers and other landmass.
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Development of flowering plants. World was a warm place with no seasons. Ancient birds developed, and dinosaurs continue to flourish and create new species. (K-Pg) Paleogene extinction ends dinosaur life.
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Supercontinent pangea begins to drift apart. Marine life diversified, and small mammals developed. Reptiles and dinosaurs dominated the lands.
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Large mass extinction of many types of marine animals including trilobites.
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Abundance of sharks and amphibians.Large swamps and coal forming forests. Earliest reptiles, scale trees and seed ferns appear.
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Armored fish go extinct, but abundance of several other fish species occur. Earliest amphibians and ammonites.
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Earliest terrestrial plants and animals. Tiktaalik eurypterids developed.
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Echinoderms exist- Starfish, sand dollar, sea urchin, sea cucumber. Invertebrates are dominant, mollusks become abundant. Earliest fish are jawless, but later fish become jawed and armored.
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Earliest record of marine life. Trilobites, are very dominant.
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Glaciers continue to expand. Lands continue to change and form to how we see them today. Ice age conditions lead to extinction of mammals such as the mammoth. Humans develop and take over.
