Geological Era

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Era, Geological


an interval of time in the earth’s geological history, during which an erathem formed. Eras are subdivided into periods; several eras combine to form an eon. There are three eras in the most recent Phanerozoic eon: the Paleozoic, Mesozoic, and Cenozoic eras. (See alsoGEOCHRONOLOGY.)

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This period of unprecedented growth is what has turned the human enterprise into a project that threatens its own basis in nature and has given rise to the idea of the Anthropocene, where a change brought about by humans is so radical that the Earth can be seen to be entering a new geological era.
The artist and his instruments of torture immensely accelerate the imperceptible transformations that take place over geological eras, until each is made visible to the human eye.
Since the appearance of visible life on Earth, 380 million years had to elapse in order for a butterfly to learn how to fly, 180 million years to create a rose with no other commitment than to be beautiful, and four geological eras in order for us human beings to be able to sing better than birds, and to be able to die from love.
The Cenozoic Era is the current and most recent of the three Phanerozoic geological eras, following the Mesozoic Era and covering the period from 66 million years ago to the present.
THE TOPIC: For tens of thousands of years--as geological eras go, up until just "yesterday"--people organized themselves into small groups of hunter-gatherers, each of which developed its own methods for surviving under harsh conditions.
Millions and millions of gallons have been drawn out from the well, the source originating from the bedrock formed during early geological eras.
Evidence exists in the layers of black shale that mark the extinction events at the boundaries between geological eras.
In addition, rocks from at least three other geological eras were found within the rubble, as well as a sand beach near the top of Taum Sauk believed to be 530-million-years-old.
HISTORY/ART: Pick one of tile geological eras in the diagram on pp.
Like many 20th Century sculptors, the artist has pursued connections with ancient megalithic cultures, the Stone Age and past geological eras.

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