By: magic-gigapans
Image: Robin Rohrback, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 4 May 2020
Last Updated: 28 May 2020

860 megapixels
22,476 x 38,260 pixels
74.9 in X 127.5 in at 300dpi
3,998 pixels per inch

The sample is a tubestone stromatolite of the Neoproterozoic Noonday Formation, a post-glacial cap carbonate, from the Queen of Sheba mine in Death Valley. Notably, the inner tube, which appears here as the more resistant portion of the rock and likely rich in silica, co-exists with galena and other sulfide minerals, hence it was mined for lead and zinc at one time. The image is upside-down. The exact location and a history of the Queen of Sheba mine can be found at the following website: http://www.nps.gov/history/history/online_books/deva/section3a12.htm Sample provided by Dr. Jay Kaufman of the University of Maryland, College Park.