why have deserts developed in the south-western part of north america?name the important desert of this region
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During the Paleocene, some time after the dinosaurs' extinction, most of North America (including Alaska) was covered in evergreen tropical rain forests. But after some time, due to a heavy decline in precipitations, these jungles were replaced by dry deciduous forests as well as arid grasslands.
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During the Paleocene, some time after the dinosaurs' extinction, most of North America (including Alaska) was covered in evergreen tropical rain forests. But after some time, due to a heavy decline in precipitations, these jungles were replaced by dry deciduous forests as well as arid grasslands.
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