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A famous locality for structural geologists outside Shamokin, Pennsylvania. The Whaleback, the low ridge in the center of the quarry, is the surface of an anticline exposed by coal mining. On the left (east) wall of the quarry one can see the anticline-syncline pair that was the subject of my first ever GigaPan (shot...
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... caught just before sunset.
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Or, rather, a folded gneiss. Near Edwards, New York.
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Viewed from Frederick County (Opequon Creek is the dividing line), you can see strata of the Ordovician-aged Edinburg Formation limestones and shales. These anticlines and synclines formed during Alleghanian mountain-building in the late Paleozoic. Another set of folds is just upstream: gigapan.org/gigapans...
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This amazing piece of float was located under the Route 15 Bridge in Point of Rocks, MD. My current thinking is that the lower left corner is Catoctin formation but I am scratching my head over the upper right portion. Perhaps it is also Catoctin Metabasalt just with a different, more rigid consistancy. However, the p...
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Radiolarian chert in Marin headlands; shot with Canon SX110IS at 10x zoom
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This outcrop is located along the new portions of West Virginia Route 55 west of the town of Moorefield. The view is looking at the south side of the freeway and overlooking the total extent of an incredible road-cut exposure of folded paleozoic sedimentary strata over 500 meters long. This fine example of tectonic ...
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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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Looking at an anticline in the Ordovician-aged Edinburg Formation from Frederick County, Virginia, on the western shore of Opequon Creek, gazing across into Clarke County. Strata are Ordovician; deformation is Alleghanian (late Paleozoic). Another set of folds is just upstream: gigapan.org/gigapans/120300 ...
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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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