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Lamprophyre Dikes at Mather Gorge (Great Falls, MD) by sladler

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About This Gigapan

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Taken by
sladler sladler
Explore score
1
Size
0.76 Gigapixels
Views
1118
Date added
Jun 07, 2013
Date taken
Jun 04, 2013
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Description

In this panorama, the Potomac River can be seen flowing through Mather Gorge in Great Falls Park. It was taken from the Virginia side of Great Falls, looking towards the Maryland side. Cliffs of metagraywacke line Mather Gorge, and have been dated at ~460 Ma. Steeply dipping lamprophyre dikes can be seen intruding into the metagraywacke. A crystallization age of ~360 Ma has been obtained from K/Ar dating of biotite in the dikes.


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Stitcher Notes

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GigaPan Stitch.Efx version 2.2.0375 (Windows)
Panorama size: 762 megapixels (54216 x 14072 pixels)
Input images: 252 (28 columns by 9 rows)
Field of view: 71.3 degrees wide by 18.5 degrees high (top=0.7, bottom=-17.8)
Settings:
Vignette correction on: c1=0.0445 c2=-0.0337
All default settings
Original image properties:
Camera make: Canon
Camera model: Canon PowerShot SX120 IS
Image size: 3648x2736 (10.0 megapixels)
Capture time: 2013-06-04 14:02:19 - 2013-06-04 14:28:30
Aperture: f/8
Exposure time: 0.004
ISO: 80
Focal length (35mm equiv.): 361.4 mm
Digital zoom: off
White balance: Fixed
Exposure mode: Manual
Horizontal overlap: 46.8 to 51.3 percent
Vertical overlap: 46.7 to 50.7 percent
Computer stats: 4095.11 MB RAM, 2 CPUs
Total time 37:47 (9.0 seconds per picture)
Alignment: 14:37, Projection: 5:39, Blending: 17:31
(Preview finished in 23:09)

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