Did a Biology test today, and was struck with delight when I saw a Geographically related question! The question was asking how a species divide and turn into a new species. I pointed out that millions of years ago, the large orogenic belts would not have been there and instead just flat layered strata for which an ancestral species could inhabit. The tangential process of orogenesis, though, through compression, uplifts the land, forming fold mountains. This is a slow process meaning the ancestral species could survive the gradual change in climate; the adaptation they would make would activate gene mutation and a variation on a species would be created. Hope it's correct! (Well, the Geography is at least!)
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