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To: Webster Groves who wrote (1419)8/11/2010 12:46:21 AM
From: The Vet2 Recommendations  Read Replies (1) | Respond to of 4326
 
If the Rockies were made of limestone, they wouldn't be there.

The Canadian Rockies are indeed composed largely of limestone and some dolomite. There is more granite in the US Rockies but be assured that the Rockies in Canada are a huge lump of sedimentary rock and much of it is pure limestone.

.... And they are still here ... though they do fall down occasionally ...

Check out Turtle Mountain and the Frank Slide, a most notable example...

I was on top of that mountain a couple of weeks ago and it is just a big heap of faulted limestone and it is still falling down...

On April 29, 1903, at 4:10 a.m., 82 million tonnes (30 million cubic metres) of limestone crashed from the summit of Turtle Mountain and buried a portion of the sleeping town of Frank. The dimensions of the rock mass that fell are 150 metres (500 feet) deep, 425 metres (1,400 feet) high and one kilometre (3,280 feet) wide.

frankslide.com