Top 5 Obsidian Sources: Washington

1. Inman Creek (OR - combined A and B varieties)
2. Obsidian Cliffs (OR)
3. Newberry Volcano (OR)
4. Elk Pass
5. Whitewater Ridge (OR)

Washington suffers from a shortage of artifact-quality obsidian sources and it's no surprise that four of the five top sources represented among Washington artifacts are located in Oregon. The only indigenous source that made the list was Elk Pass, a High Cascades source whose prehistoric use was largely relatively local. No artifact from this source has yet been found to the south in Oregon.

The total number of characterized Washington artifacts numbers about 1,500 and all of the top 5 sources contained at least 100 analyzed artifacts.