See if this link works, it's the original picture and description that describes it as from Colorado. The original picture has spread around, and I've seen it listed many times as being from Anzick. You can google pictures of the Anzick cache and see all of the artifacts. I've seen the cache a couple of times, and it isn't from that group. There is one similar, but broken and missing a wedge. http://www.centerfirstamericans.com/mammoth/issues/Volume-22/vol22_num2.pdf
Thanks Joshua for the correction. Much appreciated!