248 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 toa 
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 
amygdules, 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. 
