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Lower Sequence of the Gunflint Iron Formation by Brian Allison

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About This Gigapan

Taken by
Brian Allison Brian Allison
Explore score
Print Pricing
$4.00 to $782.00
0.57 Gigapixels
Date added
Jul 01, 2013
Date taken
Jun 27, 2013

The southward-dipping lower sequence of the approximately 100 meter Gunflint Iron Formation taken on a roadcut on the Gunflint Trail. Taken not far stratigraphically from the contact between the Paleoproterozic iron formation and the underlying Neoarchean Saganaga Tonalite. This sequence technically can be called the lower part of the Upper Cherty member of the Gunflint Iron Formation.

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Stitcher Notes


GigaPan Stitch version 2.1.0160 (Macintosh)
Panorama size: 567 megapixels (34104 x 16652 pixels)
Input images: 209 (19 columns by 11 rows)
Field of view: 53.3 degrees wide by 26.0 degrees high (top=16.3, bottom=-9.7)
Vignette correction on: c1=0.00201 c2=-0.00165
All default settings
Original image properties:
Camera make: Canon
Camera model: Canon PowerShot S3 IS
Image size: 2816x2112 (5.9 megapixels)
Capture time: 2013-06-27 16:15:40 - 2013-06-27 16:27:41
Aperture: f/8
Exposure time: 0.0025
ISO: 400
Focal length (35mm equiv.): 435.8 mm
Digital zoom: off
White balance: Fixed
Exposure mode: Manual
Horizontal overlap: 26.5 to 73.1 percent
Vertical overlap: 27.6 to 45.4 percent
Computer stats: 8192 MB RAM, 4 CPUs
Total time 6:40 (1.9 seconds per picture)
Alignment: 2:24, Projection: 1:23, Blending: 2:53
(Preview finished in 4:30)

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