You’ve probably seen the Redwall Limestone before The Redwall - TopicsExpress



          

You’ve probably seen the Redwall Limestone before The Redwall Limestone might very well be the single most distinctive unit in Grand Canyon. Passengers flying overhead in airplanes can often make out its massive, red-stained faces. The Redwall is a limestone from the Mississippian period. At this time, a great, warm, tropical seaway covered the Western portion of North America. All sorts of life lived in these seaways, forming all sorts of shells and leaving enormous piles of fossils and carbonates that wound up as hundreds of meters of limestone. The Redwall contains very little sediment that isn’t carbonate. Most of the rocks in the Canyon have a silicic component even if they are limestones; in the Redwall contains
Posted on: Fri, 01 Aug 2014 21:25:01 +0000

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