Historic image LS_0573 is part of the 'UVA lantern slides' collection; the topic area is 'Concretions'. Location is Ontario, Canada (imprecise). The image has the following description: 'Ironstone concretions in shale. South shore of Lake Huron, about 25 miles northeast of Sarnia, Ont. Lee. .' The image was scanned from a lantern slide as part of the USGS NGGDPP deliverable for 2017-2018. The physical location is 900 Natural Resources Dr., Ste 400, Charlottesville, VA 22903. Library. The author is unknown. The image is dated unknown.