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Snowball Earth > Snowball Earth Educational Rock Sample Suite #7 by Robin Rohrback

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About This Gigapan

Taken by
Robin Rohrback Robin Rohrback
Explore score
0.34 Gigapixels
Date added
Jul 26, 2012
Date taken

Massive clast-poor diamictite from the Ulveso Formation in east Greenland. The sandy deposits in this otherwise massively bedded sample are interpreted as meltwater-washed horizons deposited in a fluctuating subglacial environment. The sandy horizon was probably originally deposited in cavities exposed by melting basal ice during a period of increased warmth and sediment discharge. This deposit was subsequently eroded (sheared) by basal ice contact during glacial flow. Sheared reactivation surfaces in the sample suggest that the glaciers were at least partially wet-based.

Sample is 11.7 cm across at its widest point.

This sample is from the Snowball Earth Educational Rock Sample Suite, and comes courtesy of Paul Hoffman, Harvard University; Eugene Domack, Hamilton College; and Timothy Fox, Hamilton College.
For more information on the Snowball Earth Educational Rock Sample Suite, visit www.snowballearth.org/samples.html Will open in a new tab or window .
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 2.0.0501 (Windows)
Panorama size: 338 megapixels (16012 x 21112 pixels)
Input images: 72 (6 columns by 12 rows)
Field of view: 14.1 degrees wide by 18.5 degrees high (top=10.4, bottom=-8.1)
Vignette correction on: c1=-0.15 c2=0.0147
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: 58.1 to 60.1 percent
Vertical overlap: 53.1 to 54.6 percent
Computer stats: 4000.13 MB RAM, 4 CPUs
Total time 10:12 (8.5 seconds per picture)
Alignment: 33 seconds, Projection: 2:47, Blending: 6:51
(Preview finished in 4:27)

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