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about 450 million years ago, we find the southern continents again covered by ice sheets. The continents of Gondwanaland were located over the South Pole region at this time, with northern Africa just at the pole. Grooves and striations in the bedrock buried by tillites have been found in what is now the Sahara Desert. These markings indicate the point from which the glaciers moved northward.

2007-08-30 13:34:13 · answer #1 · answered by just4a2nd 3 · 0 0

What glacier? There was no requirement that a glacier existed, so there is no need to answer.

2007-08-30 20:33:02 · answer #2 · answered by cattbarf 7 · 0 0

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