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Pant y Wrach copper mine, North Wales. Natural growths in a man-made tunnel, formed over the last 150 years or so. A nice little mine with lots to see, but access is along a rather damp adit, flooded to knee level, then a short crawl. Not somewhere to visit in your Sunday best. Trying out some underground photo tec...
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Taken with a stereomicroscope using a lumix LX3 digiscoping through the eyepiece courtesy of a camlink mount. The image consists of 76 individual pictures stiched using PTGUI. Thanks to the curvature of the camera lens, plus that of the microscope this was a tricky one to stich. Not so sharp eyed observers will notice ...
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Edi and Berti climbed atop a boulder of banded iron formation (BIF) in Soudan, Minnesota.
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Another GigaPan shot in a hurry under partly cloudy conditions that nearly drove me mad. Turned out better than I expected, all things considered.
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A relatively quick overview shot, just before the mine museum closed.
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The Sir James Pit was operated for the mining of siderite, an iron carbonate ore. The siderite ore was originally deposited on the seafloor ~2.75 Ga as the result of seafloor hydrothermal venting in the Archean oceans. The dark outcrop seen here at the lip of the pit is thought to represent the primary vent from whic...
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Exposed in a roadcut just south of Wawa, Ontario, this is one of the Banded Iron Formations (BIFs) in a greenstone belt of the Superior Province.
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The same BIF seen in cross section in another roadcut exposure that's uploading, this is the top surface of that exposure where the iron formation has been glacially sculpted and polished.
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- 585
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- 145
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- 1
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Yes they have portions of the "iron curtain" in Fulton, Missouri at the location where a church bombed by Nazis is erected and Churchill spoke there about the iron curtain and tyranny.
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