W-2, W-2a, W-2b Geochemical Reference Material Information Sheet
USGS-W-2-W-2a-and-W-2b-IS_2022-508.pdf
(508.4 KB)
Detailed Description
USGS Geochemical Reference Material Information Sheet for W-2, W-2a, and W-2b (Diabase), updated June 2022.
Reference material W-2b is no longer available.
Sources/Usage
Public Domain.