stripes
An alnoitic dyke in the river south of Ste-Anne de Bellvue, at the extreme southwest end of the Island of Montreal, is no longer exposed. The rock varies from highly porphyritic varieties with phenocrysts up to 5 cm in diameter of phlogopite, olivine and pyroxene to equigranular varieties of the same minerals together with melilite, magnetite, pyrrhotine, apatite and perovskite; Adams (1896, p. 271) thought that nepheline may also be present.
ADAMS, F.D. 1892. On a melilite-bearing rock (alnoite) from Ste. Anne de Bellevue near Montreal, Canada. American Journal of Science, 43: 269-79.
ADAMS, F.D. 1896. Report on the geology of a portion of the Laurentian area lying in the north of the Island of Montreal. Annual Report, Geological Survey of Canada, 8, part J: 1-160.
GOLD, D.P. and MARCHAND, M. 1969. The diatreme breccia pipes and dykes, and the related alnoite, kimberlite and carbonatite intrusions occurring in the Montreal and Oka areas, P.Q. Part 1: The alnoite, kimberlite, and diatreme breccia pipes and dykes. In Geology of the Monteregian Hills (Ed. G. Pouliot). Geological Association of Canada - Mineralogical Association of Canada, Guidebook: 5-42.
