In this locality the original rock is a peridotite, relatively low in nickel, which has been altered to serpentine.
"The Economic Aspect of Geology"
C. K. Leith
Into these sediments there are intruded certain peridotite dikes.
"The Economic Aspect of Geology"
C. K. Leith
Asbestos deposits occur chiefly as veinlets in serpentine rock, which is itself the alteration of some earlier rock like peridotite.
"The Economic Aspect of Geology"
C. K. Leith