244 



D E S C 11 I P T I V E 



CATALOGUE 



taiy, crystalline lumps, and much epidote, with a dark olive-green mineral, sup- 

 posed to be chlorite. 



403. Basaltic rock — colour, reddish gray; fine granular; contains numerous 

 grains of epidote and chlorite. 



404. Metamorphosed siliceo-argillaceous shale — calcareous ; colour, light red, with 

 bluish-gray spots ; joints lined with carbonate of lime ; body of the rock filled with 

 grains of the same mineral. Has the appearance of having been baked. 



405. Same as No. 404 — colour, reddish yellow ; siliceous ; becomes quartzose in 

 the vicinity of intrusive dikes ; granular ; fracture uneven. 



406. Metamorphosed sandstone schist — numerous grains of epidote and of iron 

 pyrites disseminated through it. 



407. Same as No. 404 — more highly metamorphosed, and more compact; colour, 

 bluish gray and reddish yellow. All these schists are calcareous, and their specific 

 gravity increases with the increase of metamorphosis. 



408. Basaltic rock — colour, dark reddish gray, almost black ; contains much iron 

 pyrites ; effervesces with acids. 



409. Metamorphosed shale — calcareous; very compact; colour, reddish yellow; 

 fracture smooth. Is rendered porphyritic by the dissemination of a few crystals of 

 flesh-red felspar. 



410. This rock bears some resemblance to the volcanic grit beds, but more to the 

 quartzose porphyries of the Wisacode River. Is porphyritic ; contains disseminated 

 crystals of felspar and hornblende ; in the mass, presents a granular appearance. 

 Colour, flesh-red, with numerous black dots made by grains of magnetic iron. Con- 

 tains some small pebbles and fragments of slate. 



411. Breccia — derived from the sand-rock beds; very cellular; contains large 

 quantities of epidote ; general colour, dark brick-red ; contains fragments of felspar, 

 and numerous grains of magnetic oxide of iron ; slightly calcareous. 



412. From nests in No. 404 — contains calcareous spar, fluor spar, and epidote. 



413. Greenstone — massive; colour, dark gray ; crystalline. 



414. Calcareous beds — contain epidote, calcareous spar, laumonite, fluor spar, and 

 green earth. Under the influence of trap dikes, these beds become cherty. See 

 No. 340. 



415. Fine granular quartzose shales — much bent and contorted ; colour, greenish 

 gray. Contain numerous fucoidal impressions. 



416. Greenstone. 



417. Greenstone — very fine granular. 



418. Slaty greenstone — thinly laminated ; interstratified with beds of schistose 

 quartz rock. 



419. Metamorphosed siliceous shale — colour, brownish red. Resembles No. 176. 



420. Basaltic rock — very fine-grained. 



421. Metamorphosed earthy schistose rock — porphyritic. 



422. Basaltic rock — colour, dark gray, with a jmrplish tint; slightly porphyritic. 



423. Slaty greenstone — grayish-coloured; very calcareous; amygdaloidal. Con- 

 tains epidote and small particles of native copper. 



