Annual report . Fig. S.—Island 27, Belmont lake, Peterborough county. Crystalline limestone of the (jrenvilleseries on right, Hastings slate on left. A few pebbles occur near the 3 Fig. °.—Part of Belmont lake, looking north towards Sidonia island. 28 Bureau of Mines No. 4 ConglomerateThe pebbles of the conglomerate are water-worn, and consist of quartz-porphyry,feldspar-porphyry, granite-porphyry, felsite, fine-grained greenstone, fine-grained greyor greenish grey schist, crystalline limestone, Fig. 11, chert varying from fine to coarsein grain and from greyish white to red in
Annual report . Fig. S.—Island 27, Belmont lake, Peterborough county. Crystalline limestone of the (jrenvilleseries on right, Hastings slate on left. A few pebbles occur near the 3 Fig. °.—Part of Belmont lake, looking north towards Sidonia island. 28 Bureau of Mines No. 4 ConglomerateThe pebbles of the conglomerate are water-worn, and consist of quartz-porphyry,feldspar-porphyry, granite-porphyry, felsite, fine-grained greenstone, fine-grained greyor greenish grey schist, crystalline limestone, Fig. 11, chert varying from fine to coarsein grain and from greyish white to red in color (jaspilyte), white quartz and eozoon fragments. The porphyry pebbles are grey to pink in color, and consist of a fine-grained matrixof quartz, feldspar and biotite in which are set phenocrysts of the first two mineralswhich are often remarkably well preserved. Sometimes these phenocrysts of feldsparshow albite twinning lamellae. The porphyry pebbles are of common occurrence and maybe observed in the conglomerate on several of the islands of Belmont lake, includingSidonia and Big islands. The fine-grained greenstone pebbles are seen under the microscope to consist of anetwo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
