Ultramafic tectonic deposit, mined for asbestos. The Eden Mills mine is in Eden, Lamoille Co., the Lowell mine is in Lowell, Orleans Co., and the "C"-Area mine straddles the town and county border, being partly in one town and county and partly in another. The first two levels at the north end are largely in Lowell, the rest in Eden. (Have fun figuring out how to label specimens from this area!)
References:
Rocks & Minerals: 21: 490.
Rocks & Minerals: 22: 925.
Hadden, Sue (1996): Minerals of the Quarries of Lowell-Eden, Vermont (Rocks & Minerals 71:236-246).
Ken Hollmann (2001) Epidote from the VAG Mine, Belvidere Mtn., Lowell, Vermont. Mineral News, 17, #2, 1-7. (See also vol. 12, #7.)