Annual report . together with alittle calcite, sericite and iron oxides. The rock passes to the east into a dark grey,finely banded slate, consisting largely of greenish brown mica and subordinate quartz,epidote, calcite, zoisite and iron oxides. This rock then passes into a conglomerate, theposition of which is shown on the map. Slate-like rocks occur on the east shore of Belmont lake between Green island andCrow river. They appear to be a fine-grained facies of the greywacke and are often veryfinely banded or bedded, the bedding being due to interbanding of coarse and fine sect
Annual report . together with alittle calcite, sericite and iron oxides. The rock passes to the east into a dark grey,finely banded slate, consisting largely of greenish brown mica and subordinate quartz,epidote, calcite, zoisite and iron oxides. This rock then passes into a conglomerate, theposition of which is shown on the map. Slate-like rocks occur on the east shore of Belmont lake between Green island andCrow river. They appear to be a fine-grained facies of the greywacke and are often veryfinely banded or bedded, the bedding being due to interbanding of coarse and fine sections show the slate to be made up of a fine-grained matrix of dark-coloredmica, quartz, feldspar, calcite, and iron oxides. In this matrix angular fragments ofquartz and feldspar occur. The conglomerate on Big island is sometimes interbeddedwith slate, but it has not been found practicable to show it with a separate color on themap. Along the northwest shore of this island the slate is well exposed, and consists. Fig. 12. (irc> wack. Hastings series, showing bedding. Belmont lake. of brown mica, muscovite, quartz, chlorite and iron oxides. On the east shore of Belmontlake, one hundred yards south F Crew River point, a narrow band of blackish brownslat is interbedded with coarse conglomerate, the latter containing a light-coloredboulder of eozoon, Pig. 5; the conglomerate here was referred to in a precedingparagraph. This interbedding of coarse boulder conglomerate and slat shows that con-ditions of deposition must have rapidly changed during Hastings time. The slate onthe west part of island No. 27, one of the Twin islands, is very fine-grained and compact,and ((insists of mains of quartz and feldspar together with considerable brown micascales, iron oxides and a little calcite. The map does not show this bed on account ofthe small size of the island, but Fig. 8 is a photograph of the slate, showing its contactwith magnesian, crystalline limestone of the Grenville series. On
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidannualreport191302onta
