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

Uploaded: 5 May 2020
Last Updated: 1 Jun 2020

345 megapixels
18,688 x 18,480 pixels
62.3 in X 61.6 in at 300dpi
36 pixels per inch

Red alkali feldspar granite from the Wolf River Batholith (~1.47 billion years old). This granite is exposed along the Wolf River at a set of rapids called Gilmores Mistake. It was so named because, during the logging heyday of the late 19th century, the loggers who were rafting the logs down the Wolf would get them hung up around these rapids. A man by the name of Gilmore tried to blast them...but failed. Star fractures from blasting are still visible in the exposed granite (and the rapids are still there!). This site is a popular kayakers pullout. Sample collected and contributed by Beth Johnson, University of Wisconsin-Fox Valley (April 2014).