Graphite occurs disseminated through a small pegmatite lens which is intruded into limestone in the City Quarry, Lewiston, Maine. The mineral is not commonly reported in the pegmatites of Maine as there is but one paper known to the writer concerning graphite in Maine pegmatites (27). Landes (17a) lists graphite among the numerous minerals of the hydrothermal stage in the pegmatites of Maine. Bain (2) has indicated his belief in the same manner of origin for the Louisa, Quebec, graphite deposits. There are numerous other published accounts of the association of graphite with the contact zones between granitic and sedimentary rocks, or their metamorphosed equivalents. It is probable that the graphite of the City Quarry pegmatite represents a hydrothermal product.

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