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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. |