Deposit

Eastern Adirondack Mountains

Eastern Adirondack Mountains is a mining district in New York with published resource estimates, recorded in the USGS USMIN mineral deposit database from the 2022 graphite deposits data release.

Facts on this page last re-verified Aug 13, 2026 — the oldest verification date among its current claims. How we verify.

Location: New York, United States (43.335, -73.821 approx.)

Commodities: graphite

Published resource estimates

As compiled by USGS USMIN from the cited studies. Resource classes follow the source; "approximate" flags values USMIN reports as approximations. These are not current company reserve statements.

Material	Class	Amount	Grade	Contained	As of	Reference
graphite	Demonstrated plus Identified	2,100,000 t	4.5 percent	94,500 metric tons graphite	Jan 1, 1917	Fogg and Boyle (1987), Page 20 — Fogg, C.T., and Boyle, E.H., Jr., 1987, Flake and high-crystalline graphite availability–Market economy countries—A minerals availability appraisal: U.S. Bureau of Mines Information Circular 9122, 40 p.

Recorded production

Eastern Adirondack Mountains: produced 4,500 metric tons of graphite, 1850–1920. From the 1850s to the early 1920s mines in the area produced over 5,000 tons of flake graphite (Cameron and Weis (1960), Page 284 — Cameron, E.N., and Weis, P.L., 1960, Strategic graphite–A survey, chap. E of U.S. Geological Survey authors, Contributions to economic geology, 1958: U.S. Geologic Survey Bulletin 1082-E, 201-321 p., https://doi.org/10.3133/b1082E.)

Exploration and site history

Production: “In the southeastern Adirondacks group […], past production came from 12 properties. All but two of these properties are within the boundaries of the Adirondack State Park and thus not open to possible commercial production.” (Fogg and Boyle (1987))
Active — Mines in the district were active from the 1850s to the early 1920s, 1850–1920 (Cameron and Weis (1960))

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

Sources

U.S. Geological Survey · published Jan 1, 2022 · retrieved Aug 13, 2026 · archive unavailable: archive.org has been unreachable since 2026-08-12, so no Wayback snapshot could be captured for this record; recheck on a weekly pass