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Magnetite muscovite schist from Thoroughfare Gap by Callan Bentley

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About This Gigapan

Taken by
Callan Bentley Callan Bentley
Explore score
0.19 Gigapixels
Date added
Apr 24, 2012
Date taken
Apr 24, 2012

Muscovite schist (metamorphosed Harpers Formation?) from Throroughfare Gap / Bull Run Mountain, Virginia, bearing euhedral porphyroblasts of magnetite.

Sample measures 8.5 by 2.5 cm.

Image made as part of the MAGIC project (Mid-Atlantic Geo-Imagery Collection) using Northern Virginia Community College's gigamacro rig, as seen here:
gigamacro.com/gigapixel-macro-imaging-system Will open in a new tab or window/

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Stitcher Notes


GigaPan Stitch version 1.2.0087 (Windows)
Panorama size: 194 megapixels (21728 x 8936 pixels)
Input images: 72 (12 columns by 6 rows)
Field of view: 33.3 degrees wide by 13.7 degrees high (top=7.6, bottom=-6.0)
Vignette correction off
Original image properties:
Camera make: unknown
Camera model: unknown
Image size: 4752x3168 (15.1 megapixels)
Capture time: unknown
Aperture: unknown
Exposure time: unknown
ISO: unknown
Focal length (35mm equiv.): unknown
White balance: unknown
Exposure mode: unknown
Horizontal overlap: 67.5 to 68.3 percent
Vertical overlap: 63.6 to 65.0 percent
Computer stats: 4000.13 MB RAM, 4 CPUs
Total time 4:58 (4.1 seconds per picture)
Alignment: 58 seconds, Projection: 47 seconds, Blending: 3:13
(Preview finished in 2:28)

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