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Metamorphic Rocks > Difficult Run Migmatite 2 by Chris Johnson

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About This Gigapan

Taken by
Chris Johnson Chris Johnson
Explore score
0.44 Gigapixels
Date added
Oct 09, 2012
Date taken
Sep 09, 2012

This outcrop can be found along the Difficult Run Trail north of Georgetown Pike. The camera is pointed South. This is part of the Mather Gorge Formation. A proterozoic metagraywacke. This outcrop is an example of early stages of partial melting in action. As the graywacke underwent high grades of metamorphism some of the minerals (particularly quartz and feldspars) began to melt and reform. In this image the differential erosion highlights the quartz that has melted and reformed. It is more resistant than the rest of the graywacke. Because of this it stands out. This migmatite and others like it are the result of tectonic collisions during the Taconic and Acadian Orogenies.

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Stitcher Notes


GigaPan Stitch version 2.0.0501 (Windows)
Panorama size: 436 megapixels (29052 x 15012 pixels)
Input images: 150 (15 columns by 10 rows)
Field of view: 42.9 degrees wide by 22.2 degrees high (top=-2.4, bottom=-24.6)
Vignette correction on: c1=-0.0388 c2=-0.0239
All default settings
Original image properties:
Camera make: Canon
Camera model: Canon PowerShot SX120 IS
Image size: 3648x2736 (10.0 megapixels)
Capture time: 2012-09-09 09:55:54 - 2012-09-09 10:12:45
Aperture: f/4.3
Exposure time: 0.05
ISO: 80
Focal length (35mm equiv.): 361.4 mm
Digital zoom: off
White balance: Fixed
Exposure mode: Manual
Horizontal overlap: 45.1 to 60.1 percent
Vertical overlap: 47.9 to 56.3 percent
Computer stats: 8183.89 MB RAM, 4 CPUs
Total time 22:39 (9.1 seconds per picture)
Alignment: 7:15, Projection: 3:33, Blending: 11:51
(Preview finished in 12:39)

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