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Historic and Physical Geology

Ironstone
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Ironstone is a fine-grained, heavy and compact sedimentary rock. Its main components
are the carbonate or oxide of iron, clay and/or sand. It can be thought as a
concretionary form of siderite. Ironstone also contains clay, and sometimes calcite
and quartz. Freshly cleaved ironstone is usually gray. The brown external appearance
is due to oxidation of its surface. Ironstone, being a sedimentary rock is not always
homogeneous.
(Refernece - From Wikipedia, the free encyclopedia - internet)

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Ironstone
Cataract Creek
Kananaskis Country, Alberta
2005/05/19
Ironstone
Highwood Pass
Kananaskis Country, Alberta
2006/08/24
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