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DESCRIPTIVE CATALOGUE 



463. Red sandstone, striped with white bands. 



464. Same as No. 463, but lighter-coloured, more compact, somewhat micaceous, 

 and having large grains of quartz disseminated through it. 



465. Conglomerate. In the upper part the pebbles consist of quartz and chert, 

 cemented by siliceous matter. The pebbles vary in size from that of a pea to a 

 walnut. Colour, red. 



466. Conglomerate — from a bed forty feet below No. 465. Besides quartz and 

 chert pebbles, it also contains many of clay-slate. 



467. Same as No. 462, but darker-coloured. 



468. Sandstone, in contact with amygdaloid — colour, reddish gray ; extremely 

 compact, passing into quartzite. Intersected by numerous seams of quartz. 



469. Amygdaloid — derived from the siliceo-argillaceous beds of the sandstone 

 series. Colour, dark red ; cells filled with calcareous spar. Contains nodules of 

 jasper. 



470. From a vein in the amygdaloidal. Consists of a clayey substance, mixed 

 with siliceous matter, coloured by chlorite. 



471. Greenstone — colour, grayish green; coarse granular fracture; hornblende, 

 the predominant constituent. 



472. Altered sandstone — fine-grained; quartzose ; colour, dark gray. 



473. Greenstone trap (?) — compact; coarse, uneven fracture; somewhat fibrous 

 or striated; numerous seams lined with hornblende ; colour, grayish green. (This 

 may be a metamorphosed sedimentary rock.) 



474. Metamorphosed argillaceous slate — colour, dark brown; irregular fracture; 

 contains seams and incrustations of calcareous spar. 



475. Same as No. 474, but more compact, and somewhat siliceous. 



476. Amygdaloid — tolerably compact; irregular fracture; contains but few 

 anrygdules, filled with chlorite ; colour, brownish red. Passes into No. 477. 



477. Amygdaloid — contains numerous cells filled with some zeolitic minerals, 

 and nodules of calcareous spar, incrusted with earthy chlorite. 



478. Greenstone — colour, dark greenish gray ; compact. 



479. Greenstone — colour, dark gray ; compact; uneven fracture. 



480. Red sandstone ; fine-grained ; siliceous ; compact ; colour, light red, with 

 white stripes. 



481. Sandstone — colour, yellowish red ; fine-grained ; siliceous; the seams mottled 

 with white and dark red spots. 



482. Copper ores from " Plummer's Mine" — consisting of the sulphuret, and green 

 and blue carbonate ; the carbonates being the predominant ores. They occur mostly 

 in the form of incrustations, and in grains interspersed through the sand-rock. The 

 sulphuret is in very small particles, and mostly disseminated through the sand-rock, 

 like the carbonates. 



483. From the beds of metamorphosed shales and sandstones at "Plummer's 

 Mine." 



484. Quartzite — metamorphosed sandstone, resembling those of the Wisconsin 

 and Minnesota Rivers, and of the Falls of Pokegoma, on the Mississippi. 



