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The Acadian Orogeny took place mainly to the northeast of here. (As the name implies, Acadian-aged rocks are well-exposed in Acadia National Park in coastal Maine.) Along the Billy Goat Trail, they left one set of important structures: a series of four parallel dikes filled with the igneous rock called lamprophyre. ("L...
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The Gunnison River has cut down through Precambrian igneous and metamorphic rocks in western Colorado to form one of the deepest gorges in North America. This morning shot captures the famous Painted Wall, so named for the many light colored granitic dikes that appear to some as an artists brush strokes on a canvas of...
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- 7
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Thin, tan carbonatite dikes crosscut the greenstone in this roadcut west of Wawa, Ontario.
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Aargh, another Rainbow Bug bites! That's two really bad Rainbow Bug stitching errors (this one and Dantes View - www.gigapan.org/gigapans/52231/) and they come on two of my most highly anticipated GigaPans. I'll forgo writing up a thorough description of this one until such time as I can get it to stitch prope...
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- 65
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It was late in the day as I left Lone Pine, CA headed for Death Valley and I thought I was finished GigaPanning for the day. But when I saw these spectacular Independence dikes cutting through the Paleozoic sedimentary rocks of the Inyo Mountain foothills just east of Owens Lake I just couldn't resist shooting just on...
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I was driving really hard to catch this roadcut in the right light. It wasn't quite as spectacular as I remembered it, but it still shows off some pretty good geology.
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- 1971
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The cliff face consists of granitic gneisses cut by basaltic dikes. It is elevated above the surrounding area by a fault near the edge of the Adirondack Mountains.
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- 17
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Baboquivari Peak is a Jurassic granitoid and there are many related igneous dikes visible in this GigaPan. The peak is also sacred to the Tohono O?odham people. The Kitt Peak Observatory is also visible on the horizon.
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The open pit at the top of the Homestake Gold Mine in Lead, South Dakota beautifully exposes a series of Tertiary rhyolite dikes that were the focus of the hydrothermal system that formed this rich gold deposit. The open pit is no longer active, but it is a great opportunity for geologists to get a glimpse into the up...
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View on the stretched grasslands between the dikes and the river. These areas are flooded when the water level rises. At the other side of the river is a nuclear facililty which has been closed a number of years ago.
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