Physics · Paleoclimatology and Glacial Geology
Which of the following empirical findings provides strong geological evidence that massive glaciers were once active in geographic regions now entirely covered by deep oceans?
- 1The observation of active high-altitude mountain moraines where no modern ice exists
- 2The discovery of lithified marine rocks composed of poorly-sorted glacial till on the ocean floor✓
- 3The presence of modern tropical plant species along high-latitude coastlines
- 4The seasonal expansion of modern ice sheets in Antarctica and Greenland
Correct answer
The discovery of lithified marine rocks composed of poorly-sorted glacial till on the ocean floor
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