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Amphibolite from Great Falls, MD by Robin Rohrback

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About This Gigapan

Taken by
Robin Rohrback Robin Rohrback
Explore score
0.62 Gigapixels
Date added
Oct 26, 2012
Date taken

Amphibolite similar to the amphibolite exposed on the Billy Goat Trail.

Amphibolite is a metamorphic rock very rich in the mineral hornblende (an amphibole), which shows up black in this image. The white mineral in the rock is plagioclase feldspar.

This is a very mafic metamorphic rock, with large crystals. Amphibolite occurs as large, folded, tabular masses in the area of the Billy Goat Trail.

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Stitcher Notes


GigaPan Stitch version 2.0.0501 (Windows)
Panorama size: 618 megapixels (32260 x 19164 pixels)
Input images: 154 (14 columns by 11 rows)
Field of view: 15.2 degrees wide by 9.1 degrees high (top=7.2, bottom=-1.8)
Vignette correction on: c1=-0.0988 c2=-0.00696
All default settings
Original image properties:
Camera make: unknown
Camera model: unknown
Image size: 5184x3456 (17.9 megapixels)
Capture time: unknown
Aperture: unknown
Exposure time: unknown
ISO: unknown
Focal length (35mm equiv.): unknown
White balance: unknown
Exposure mode: unknown
Horizontal overlap: 59.0 to 61.1 percent
Vertical overlap: 53.6 to 56.0 percent
Computer stats: 3996.82 MB RAM, 2 CPUs
Total time 36:28 (14 seconds per picture)
Alignment: 3:32, Projection: 9:12, Blending: 23:44
(Preview finished in 17:10)

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