- The Amurian microplate (or Amur microplate; also occasionally referred to as the China Plate, not to be confused with the South China Subplate) is a minor tectonic plate in the northern and eastern hemispheres.
- Hendrickson Canyon Natural Resources Conservation Area (dnr.wa.gov)
The 159-acre Hendrickson Canyon NRCA contains Wahkiakum County’s last high quality, mature and old growth forest composed of 100 to 120 year old western hemlock, western red-cedar, and Sitka spruce, with scattered older trees. There are very few such remnant stands of mature or old growth forests remaining in the Willapa Hills of southwestern Washington. The site also supports a high-quality example of the western hemlock/Oregon oxalis community type and provides habitat for birds associated with old-growth forest conditions.