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

Uploaded: 2 Apr 2020
Last Updated: 29 May 2020

298 megapixels
17,856 x 16,684 pixels
59.5 in X 55.6 in at 300dpi
4,247 pixels per inch

Euhedral calcite crystals in a cobble of Precambrian-aged, amygdaloidal Castle Danger basalt, collected on the shore of Lake Superior near Castle Danger, MN, USA. Click these links to explore other faces of this cobble: https://viewer.gigamacro.com/view/H455UVo7BTHjKJ1k https://viewer.gigamacro.com/view/DT7dfZnGloIft9Hb Click here to explore a thin section cut from this sample in plane polars: https://viewer.gigamacro.com/view/xXGqKDQZ711jJ6V6 Click here to explore a thin section cut from this sample in crossed polars: https://viewer.gigamacro.com/view/DZzrto6XxhlXSsW Sample contributed by Dr. Kenneth Rasmussen.