Industrial mineral site no. 1584, known as "Squillchuk Canyon" is a site in Chelan County, Washington. This site has been associated with sandstone. A notation found in DGER Bulletin 37 on page 125 says "Rock which is believed to be silicified sandstone contains 73.2 percent silica and 2.3 percent ferric oxide. Light-brown fusion at cone 8 minus", and designates the value as "Uncertain".
