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Geologic map overlay is the 1974 Geologic Map of the Ashby Gap quadrangle, by T.M. Gathright, Jr. and P.G. Nystrom, Jr. You can buy a copy here: www.dmme.virginia.gov/commerce/ProductDetails.aspx?productID=2184
Or you can download a PDF of it here: www.dmme.virginia.gov/commercedocs/RI_36.pdf
The LIDAR...-
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LIDAR imagery provided by Dan Doctor, USGS Reston. This map view shows fine-scale topographic variation along the western Blue Ridge front, where the Blue Ridge geologic / physiographic province meets the easternmost Valley & Ridge province (Shenandoah Valley). The most striking feature is the beautiful expressio...
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Airborne laser scanning – a new method to geological mapping and research Laser scanning techniques are rapidly spreading to geological surveying, mapping and research. Geologists are eager to include this new method in their toolbox as it is giving accurate elevation and position information regardless of light c...
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The Söderfjärden plain is the result of a meteorite impact about 520 million years ago. Its meteorite edges are well preserved. The arial view of the crater and its surrounding rim has fascinated many spectators. "The most beautiful meteorite crater in Finland" has a diameter of about 4 miles and is more than 300 met...
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