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A xerothermic period is a period of particularly warm, dry heat, following glaciation.
The Precambrian time period is segmented into very few parts because the fossil record is scarce.
The period of Earth's time that would be considered longest is the Precambrian Era.
It looked like a sphere
Glaciations are the times during which glaciers grew and covered large parts of continents. An interglacial period is a geological time between glaciations.
That's a very long timetable from 4,500, 000,000 years ago right up to 542,000,000 years ago, a total of 3,958,000,000 years.From low surface temperatures, with extensive glaciation to warm temperate conditions and no glaciation, which seemed to have occured in cycles over that time period.
The Earth was in an interglacial period of warming called the Sangamon Interglacial at this time period. The Illinois glaciation preceded it, and the Wisconsin episode of glaciation followed it. We are currently in an interglacial period known as the Holocene.
Precambrian is BEFORE the Cambrian period!
It was the Precambrian time period.
Extensive areas of the northern hemisphere were covered by glaciers most recently in the Pleistocene Epoch, with periods of glaciation starting around 1.8 million years ago. The most recent period of glaciation ended around 10,000 years ago.
The Precambrian time period is segmented into very few parts because:
Ice age.
A xerothermic period is a period of particularly warm, dry heat, following glaciation.
Precambrian is a geologic period that extends as back as 4.500 million years ago. Fossils are very rare from that period of time.
Well for one thing, it didn't. The definition of Ice Age is a period of extensive glaciation with brief interglacials between the points of highest glaciation. By that definition we're are still in the middle of an ice age, a warm bit of one, but still in one. If we weren't in an Ice Age there would be no glacials, whatsoever.
The Precambrian is a long period and just as Earth has many climates now, it had many then.
Except for a short period when the Earth was molten, a solid crust had formed in the Precambrian.