Deposit

Grass Creek

Grass Creek is a rare earth occurrence in Wyoming, recorded in the USGS USMIN rare earth element occurrence database (ver. 4.0, June 2019).

Facts on this page last re-verified Aug 12, 2026 — the oldest verification date among its current claims. How we verify.

Location: Wyoming, United States (43.967, -108.636 approx.)

Commodities: heavy minerals; rare earth elements

Deposit model: unclassified

Geology

The Grass Creek area is reported….to host the largest known titaniferous black sandstone deposits in Wyoming. (Sutherland and Cola (2016))

Record imported from USGS USMIN ver. 4.0 (June 2019). Developments after that date appear on facility records, not here; see the methodology.

U.S. Geological Survey · published Jun 1, 2019 · retrieved Aug 12, 2026 · archive unavailable: Wayback snapshot 20260427015518 of the ScienceBase item exists but the archive service returned 503 on verification 2026-08-12; recheck on a weekly pass