The Canadian naturalist and quarterly journal of science . ^ Fig. 1 h is from a section of one of the so-calied serpen-tines occurrino near the dunite. Its relation to the latter isevident, for it still contains numerous grains of unaltered some specimens the change has not advanced so far as here,but in other eases the olivine has almost, if not entirely, disap-peared. The chiomite, however, always remains. Another example of the occurrence of olivine is to be found inthe case of a dark grey dolerite occurring near South Lake, inAntigonish County, Nova Scotia. When a section
The Canadian naturalist and quarterly journal of science . ^ Fig. 1 h is from a section of one of the so-calied serpen-tines occurrino near the dunite. Its relation to the latter isevident, for it still contains numerous grains of unaltered some specimens the change has not advanced so far as here,but in other eases the olivine has almost, if not entirely, disap-peared. The chiomite, however, always remains. Another example of the occurrence of olivine is to be found inthe case of a dark grey dolerite occurring near South Lake, inAntigonish County, Nova Scotia. When a section of the rockIS examined with the microscope, it is seen to consist of a beau-tifully banded triclinic feldspar, brownish augite, magnetite, andvery numerous irregular grains, or occasionally rude crystals, ofohvme. The olivine resembles that sometimes seen in is traversed by the usual cracks or rifts, which in this caseappear very broad and black, and also contains great quantitiesof black and opaque microlites, which are probably magnetite,and
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Keywords: ., bookcentury1800, bookdecade1880, bookidcanadiannatu, bookyear1881
