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Purcell Sill → Dike, Grinnell Glacier Cirque, Montana
Source info:
| Author: | |
|---|---|
| Date: | 2015-07-18 22:12:32 |
| Blog: | Mountain Beltway  |
| URL: | http://blogs.agu.org/mountainbeltway/2015/07/18/purcell-sill-%E2%86%92-dike-grinnell-glacier-cirque-montana/ |
Summary:
The Neoproterozoic Purcell Sill is a stark, obvious black stripe in the strata of Glacier National Park. Here it is emerging from behind “The Salamander” glacier, above Grinnell Glacier Cirque: Zooming in, you can see the “baked” (bleached) zones above and below this concordant intrusion. But this time, during my visit to this special place, I noticed a discordant offshoot from the main sill: See it? Up there at the …Content analysis:
Keywords:
glaciers
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