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Slickensides on slabs of Brallier Formation shale, Paw Paw Tunnel by Callan Bentley

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About This Gigapan

Taken by
Callan Bentley Callan Bentley
Explore score
0.26 Gigapixels
Date added
Aug 25, 2012
Date taken
Mar 06, 2010

The Paw Paw Tunnel on the C&O Canal exposes some fine geology, like these slickensides on a slab of the Brallier Formation: these formed due to flexural slip between layers as they folded during mountain building accompanying the Alleghanian Orogeny.

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Stitcher Notes


GigaPan Stitch version 2.0.0501 (Windows)
Panorama size: 264 megapixels (28528 x 9260 pixels)
Input images: 162 (18 columns by 9 rows)
Field of view: 117.2 degrees wide by 38.1 degrees high (top=-5.3, bottom=-43.4)
Vignette correction on: c1=0.0704 c2=-0.0339
All default settings
Original image properties:
Camera make: Canon
Camera model: Canon EOS 60D
Image size: 2592x1728 (4.5 megapixels)
Capture time: 2010-03-06 18:58:43 - 2010-03-06 19:11:34
Aperture: f/7.1
Exposure time: 0.0166667
ISO: 100
Focal length (35mm equiv.): 212.3 mm
White balance: Automatic
Exposure mode: Manual
Horizontal overlap: 34.1 to 55.9 percent
Vertical overlap: 43.7 to 94.9 percent
Computer stats: 3317.82 MB RAM, 4 CPUs
Total time 20:08 (7.5 seconds per picture)
Alignment: 10:49, Projection: 3:18, Blending: 6:01
(Preview finished in 15:25)

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