364 



DESCRIPTION OF THE 



The upper basaltic bed (No. 256) seen on this stream appears to be the same as 

 the bed seen in the bay above the Great Palisades (No. 258), underlying the 

 brecciated conglomerate and shales at that place. 



10. Baptism River* — The section on this river begins on the east side of the 

 bay, where the rock (No. 223) rises, in the form of a palisade, to the height of one 

 hundred and eighty-seven feet. It is columnar, the columns standing at right 

 angles to the dip, which is east-southeast 17°. This is underlaid by eleven feet of 

 tolerably compact amygdaloid, in beds from six to eighteen inches thick. Some of 

 the beds resemble the basaltic rock seen at other points. Below this is a bed of 

 slialy amygdaloid ; and then come thirteen feet of No. 224, which appears to be 

 made up of metamorphosed siliceous shale, with a basaltic bed intercalated. Under- 

 lying this are six feet of breccia, composed of fragments of the same rock, and 

 beneath that again twenty-four feet of basaltic rock, with a thin seam of shale 

 about the middle, dividing it into two beds. Then come eight feet of thin, decom- 

 posing, shaly amygdaloid, resting on seventy feet of No. 224, with some clay 

 partings, dividing it into four beds. About the middle of these beds is one of 

 amygdaloid (No. 225), which is hard and compact, and traversed by veins (No. 

 226) from four to seven inches in width. Beneath this is a bed of brecciated, shaly 

 amygdaloid, overlying about twenty feet of No. 223 ; and below that another bed 

 of shaly amygdaloid. 



At this point the rocks are cut through by a prismatic dike (No. 228), eighteen 

 feet wide, and bearing east and west. Between the sides of the dike and the rocks 

 traversed by it are perpendicular joints, several inches wide, filled with calcareous 

 spar, zeolites, and what appears to be decomposed chlorite. In near proximity to 

 the dike, the metamorphosed shales (No. 227) become still more highly changed. 

 The following diagram will serve to illustrate the position of the rocks near the 

 dike. 



d. Clay and marl. 



e. Vein of calcite and zeolite. 



f. Vein of decomposing chlorite. 



On the south side of the dike, the metamorphosed slate, which resembles, in all 

 respects, that seen in Kagitshiwaninawak River, except in being much more altered, 

 is very much bent and contorted by the intrusion of the dike, like the shales of 

 Passabika River, to which the rock here bears a general resemblance, although at 

 some points it is most like No. 252. The intrusion of the dike at this place has 

 caused a fault, in consequence of which these beds are not seen on the north side in 

 contact with the trap. 



These metamorphosed slates form the walls, or gate, through which the river 

 enters the lake. They are perpendicular, and about twenty feet high ; and from 

 them the Indian name of the stream is derived — Asinpatakitasibi, or River of 

 Standing Rocks. 



Beet. 2, PI. 1, N 



«. Dike. 



b. Shah amygdaloid. 



c. Metamorphosed shales, porphyritic. 



d 



'IS' 























c a e b 



