Folsom Placer District — Union County

Sun shading (lidar)

Adjust simulated sun direction on the lidar hillshade. Azimuth = compass bearing of the light (0° north, 90° east). Altitude = height above the horizon (low = long shadows).

Historical map overlays

USGS scanned historical topographic maps. Enable an overlay and adjust its opacity. Works in 2D and 3D.

Sun azimuth: 315°   Sun altitude: 45°   Z factor: 1   Lidar opacity: 1
center: —   mouse: —   zoom: —

Folsom Placer District — Union County

Gold Mining Site NM • Union County County
Description
NMBGMR mining district DIS248 (Folsom) — documented placer gold in Union County, New Mexico. Discovery circa 1940; gold occurs in Tertiary–Holocene alluvial fans, terrace gravels, and stream deposits per NMBGMR.
Historical Notes
McLemore (1994) lists Folsom among 36 New Mexico mining districts containing placer gold (NMBGMR Resource Map 24, district DIS248). Estimated placer production: minor or unrecorded placer production from 1828–1991 statewide context (662,000 oz total NM placer production). Production period: early 1900s-present. District cumulative production (all commodities): >$10,000,000. Deposit types: placer gold, scoria. Also known as: Cimarron River Valley, Des Moines, Halmark, Twin Mountains. Placer gold occurs as native gold and electrum in incised valleys and alluvial fans. Most economic placers were discovered by 1900; recreational panning may find fine colors — verify land status before prospecting. Coordinates approximate the district centroid from NMBGMR Resource Map 24 GIS (DIS248).
Status / Verification active — Verified

Take Add Data / Take Notes

Log in or create an account to save private field notes for this location. Your notes are only visible to you.

Forgot password?
or

Enter your email and we'll send you a link to reset your password.

Back to log in
or