Fig. 1
(a) Marcy anorthosite massif and (b) the Willsboro–Lewis wollastonite district (after Whitney & Olmsted, 1993; Clechenko & Valley, 2003). Dashed lines mark the internal boundaries of anorthosite domes based on field geology and gravity data (Whitney & Olmsted, 1993). Low-δ18O localities in 1A: Bu = Butternut Pond, In = Ingalls Cemetery, Hu = Hulls Falls, Ho = Howard Hill. Wollastonite deposits in 1B: W = Willsboro/Fox Knoll, D = Deerhead, O = Oak Hill, L = Lewis.
