Annual report . O,., ; insoluble, Part of the dense, fine-grained brown rock, mapped as quartzite, may be silicifiedcrystalline limestone. 19J3 The Pre=Cambrian Geology of Southeastern Ontario 75 The conglomerate of the area has a somewhat peculiar appearance, due apparentlyto incomplete sorting. Ordovician.—Horizontal beds of Black River limestonewestern portions of the area. occupy the eastern and Unconformity between Hastings conglomerate and crystalline limestone.—The con-glomerate, as shown in the cross-section at the bottom of the map, is closely infoldedwith the crystalline li
Annual report . O,., ; insoluble, Part of the dense, fine-grained brown rock, mapped as quartzite, may be silicifiedcrystalline limestone. 19J3 The Pre=Cambrian Geology of Southeastern Ontario 75 The conglomerate of the area has a somewhat peculiar appearance, due apparentlyto incomplete sorting. Ordovician.—Horizontal beds of Black River limestonewestern portions of the area. occupy the eastern and Unconformity between Hastings conglomerate and crystalline limestone.—The con-glomerate, as shown in the cross-section at the bottom of the map, is closely infoldedwith the crystalline limestone, so that a discordance in dip between the two series isnot noticeable. But the unconformity is clearly shown by the presence of pebbles andboulders of limestone in the conglomerate, Fig. 36. These may be seen on lots 14and 15 in the seventh concession of Madoc, along the west side of the road south of thecheese factory. Dikes.—Both the Grenville and Hastings are intruded by felsite and basic hitf. .16. Hastings conglomerate, holding boulder of crystalline limestone of Grenville series. Ha/zards Corners. 6 76 Bureau of Mines No. 4
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
