56°2 APPENDIX. 



From Fort Reliance, at the Eastern Extremity of Great 

 Slave Lake. — Granite of several varieties. Some specimens 

 having the aspect of sienite ; others containing flesh-red 

 felspar, in large crystals, — described as "forming undulating 

 rocks of considerable altitude." Some specimens from this 

 quarter approach to gneiss; having a foliated structure, 

 with mica in very large proportion. 



From the beach, at the entrance of the Lake, is a siliceous 

 conglomerate ; consisting of worn pebbles of flint, cemented 

 by a paste composed of sand and calcareous (effervescent) 

 matter. 



The following were found in the form of loose worn 

 pebbles, on the shore of the lake, near Fort Reliance : — 

 Bluish grey strip chalcedony; quartz crystals; quartz of 

 various shades of grey and brown ; flinty slate ; brown jasper ; 

 with fragments of a conglomerate, consisting of portions of 

 reddish jasper, in a dark grey paste. 



From Hawk Rapids. — (Lat. 66° 33°, Long. 102° 40') — 

 Reddish granite ; some specimens indicating a slaty struc- 

 ture. Grey quartz, apparently a portion of a vein. 



From Rock Rapid. — (Lat. 65° 50', Long. 98° 20') — 

 Granite of different shades of reddish and grey. 



From Point Backhouse, in the estuary of Back's River. 

 — Reddish granite of moderately fine grain. 



And lastly,— From a " Bluff, North of Point Beau- 

 fort." — Bluish grey granite of fine grain. 



