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You are browsing the archive for 2011 February 16.

16 February 2011

Outcrops of the LaHood Conglomerate

Remember the LaHood Conglomerate? Here’s a few field photos of my Rockies class visiting it last July: Amphibolite clast: Marble clast: I love how well-rounded these clasts can be — like eggs. When these grains were loose cobbles, tumbling down into the Belt Sea, the Earth was only 3 to 3.5 billion years old. The rivers which carried them downhill flowed past a landscape devoid of plants and animals. Since …

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