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Tiffs science stack

geologic time

eon the longest unit of geologic time.
era A large division of geologic time that is smaller than an eon.
period A unit of geologic time smaller than an era.
epoch A division of geologic time smaller than a period.
mass extinction The extinction of many species on Earth within a short period of time.
land bridge A land form that connects two continents that were previously separated.
geographic isolation The separation of a population of organisms from the rest of its species due to some physical barrier such as a mountain rage or an ocean
Paleozoic era The oldest era of the Phanerozoic eon.
Mesozoic era The middle era of the Phanerozoic eon.
Cenozoic era The youngest era of the Phanerozoic eon.
inland sea A body of water formed when ocean water floods continents.
coal swamp An oxygen-poor environment where, over a long period of time, decaying plant material changes into coal.
super continent An ancient landmass that separated into present day continents.
dinosaur Dominant Mesozoic land vertebrates that walked with their legs positioned directly below their hips.
plesiosaur Mesozoic marine reptile with a small head, long neck, and flippers.
pterosaur Mesozoic flying reptile with large, bat like wings.
Holocene epoch The current epoch of geologic time that started 10,000 years ago.
Pleistocene epoch The first epoch of the Quaternary period.
Ice age A period of time where a large portion of earths surface is covered by glaciers.
Glacial groove Grooves in solid rock formations made by rocks that are carried by glaciers.
Mega mammal A large mammal of the Cenozoic era.
Created by: Tiffani.omalley