When did the modern glacial interval of Earth history begin? Massive glacier cam
ID: 292854 • Letter: W
Question
When did the modern glacial interval of Earth history begin?
Massive glacier came to occupy Antarctica about 34 million years ago, which has never melted away.
Massive glacier came to occupy Antarctica about 4 million years ago, which has never melted away.
Massive glacier came to occupy Greenland about 64 million years ago, which has never melted away.
Massive glacier came to occupy Greenland about 34 million years ago, which has never melted away.
How did primates, odd- and even-toed ungulates, and members of the opossum family make their first appearance in North America at the end of the Paleocene?
These groups, which had arisen in Eurasia slightly earlier, migrated from Siberia to Alaska and spread southward via a land bridge that today is flooded by the Bering Sea.
These groups, which had arisen in Africa slightly earlier, migrated from Siberia to Alaska and spread southward via a land bridge that today is flooded by the Bering Sea.
These groups, which had arisen in South America slightly earlier, migrated from there to North America and spread southward via a land bridge called the Isthmus of Panama.
These groups, which had arisen in North America slightly earlier, migrated from Alaska to Siberia and spread southward via a land bridge that today is flooded by the Bering Sea.
Massive glacier came to occupy Antarctica about 34 million years ago, which has never melted away.
Massive glacier came to occupy Antarctica about 4 million years ago, which has never melted away.
Massive glacier came to occupy Greenland about 64 million years ago, which has never melted away.
Massive glacier came to occupy Greenland about 34 million years ago, which has never melted away.
Explanation / Answer
The modern glacial interval of Earth history begins at massive glacier came to occupy Antarctica about 34 million years ago, which has never melted away.
Ice overwhelmed the mainland in the vicinity of 50 and 34 million years back. Around 34 million years back, Tasmania and South America split far from Antarctica, leaving the mainland confined. That kick-began what's known as the Antarctic Circumpolar Current — an immense ebb and flow of chilly waters that walled the landmass off from more tropical heat.But carbon dioxide levels were likewise changing around a similar time in atmosphere, persuading that ozone depleting substances were the primary driver of Antarctica's cold move.
Primates, odd- and even-toed ungulates, and members of the opossum family made their first appearance in North America at the end of the Paleocene as these groups, which had arisen in Eurasia slightly earlier, migrated from Siberia to Alaska and spread southward via a land bridge that today is flooded by the Bering Sea.
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