Dating quaternary sediments
This idea was initially disputed by another Swiss scientist, Louis Agassiz, but when he undertook to disprove it, he ended up affirming his colleague's hypothesis.A year later, Agassiz raised the hypothesis of a great glacial period that would have had long-reaching general effects.Others, including horses, camels and American cheetahs became extinct in North America.
The climate was one of periodic glaciations with continental glaciers moving as far from the poles as 40 degrees latitude.
Unfortunately, glacial sediments are typically difficult to date.
Most methods rely on indirect methods of dating subglacial tills, such as dating organic remains above and below glacial sediments.
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The Quaternary Period is typically defined by the cyclic growth and decay of continental ice sheets associated with Milankovitch cycles and the associated climate and environmental changes that occurred.