Below is a simplified Geologic Time Chart. The purpose of this chart is to help you easily find in-depth information on eons, eras, and periods of earth’s history. We think it is convenient and useful to see the time periods all laid out in chart form. As a reference tool, you can...
Events in Earth’s history are “calendared” according to the geologic time scale. Eons, eras, periods, epochs, and ages are a few of the named units of abstract time that it divides all of the time into. Read here to learn in detail about the geologic time scale. Earth’s historyha...
Within the Phanerozoic Eon, there are three eras: the Paleozoic Era (541 to 252 million years ago), marked by the development of marine and land life; the Mesozoic Era (252 to 66 million years ago), often called the Age of Reptiles; and the Cenozoic Era (66 million years ago to prese...
To grasp just how old the Earth is might take some major mind bending. It definitely requires familiarity with technical geologic terms. After all, geologic time is so broad that it's been divided into more than 20 categories and subcategories.There areeons, eras, periods, epochs, and ...
THE PHANEROZOIC ERAS AND PERIODS. The end of the Proterozoic eon, once again, is not sharply defined in the stratigraphic record, such that there is considerable dispute as to the time periods involved. In any case, it is clear that the pace of development in the biosphere increased ...
Units of Time Precambrian is the name given to the earliest span of time in Earth history. Geologists divide the time between Precambrian and the present into three long units called eras: Paleozoic era Mesozoic era Cenozoic era These are all part of the Phanerozoic Eon ...
Labels like these are part of a system scientists use to divide up Earth's 4.6 billion year history. The biggest divisions are eons which split into eras, which break into periods, which divide into epochs and then all the way down to ages. ...
To grasp just how old the Earth is might take some major mind bending. It definitely requires familiarity with technical geologic terms. After all, geologic time is so broad that it's been divided into more than 20 categories and subcategories.There areeons, eras, periods, epochs, and ...
To grasp just how old the Earth is might take some major mind bending. It definitely requires familiarity with technical geologic terms. After all, geologic time is so broad that it's been divided into more than 20 categories and subcategories.There areeons, eras, periods, epochs, and a...
To grasp just how old the Earth is might take some major mind bending. It definitely requires familiarity with technical geologic terms. After all, geologic time is so broad that it's been divided into more than 20 categories and subcategories.There areeons, eras, periods, epochs, and a...