6 4 



From the underlying shales of division 3, Dr. Raymond 

 has collected fossils of a single species, regarding which he 

 makes the following note. "The small flattened oval 

 fossils are Caryocaris curvilineatus, Gurley. Both genus 

 and species are confined, in this general region, to rocks of 

 Levis age. The species has been found at Point Levis, 

 Deepkill, near Albany, N. Y.; and in Nevada, while the 

 genus occurs also in the Skiddaw slates of England and 

 Australia." 



The finding and identifying of this fossil corroborates in 

 a certain measure Richardson's suggestion that possibly 

 these underlying measures might belong to the Levis, 

 though Richardson's belief was founded, as it is generally 

 supposed, on a mistaken supposition regarding the relative 

 ages of the overlying and underlying strata. 



From the edge of the river, the trace of the thrust plane 

 is visible in the cliff face rising from the opposite shore. 

 The overlying strata of division 2, may be seen to be thrown 

 into a series of crenulations clearly and strikingly expressed 

 by the banded character of the measures. The regularly- 

 formed crenulations or plications, perhaps average 4 to 6 

 feet (1 • 2 to 1 • 8 m.) from crest to crest. These crenulations 

 extend up the whole height of the high, cliff face. Along 

 this rock face upstream, the plications gradually fade away 

 and towards the head of the rock-walled, amphitheatre-like 

 embayment, the strata dip regularly to the southward at 

 angles of from 35 to 45 . The strata of division 2, thus 

 exposed at the head of the amphitheatre-like embayment 

 are separated by a concealed interval of about 30 feet 

 (9 m.), from the red and dark green shales of division I, 

 exposed in the long rock cuttings on the railway line. 



The strata of division 3, consisting chiefly of dark 

 shales, outcrop along the shores of the river for a distance 

 of about 200 feet (60 m.), or as far down the river as the 

 place where the river channel commences to narrow. 

 At this place are outcrops of light coloured, quartzose 

 sandstone interbedded with shales. The strata dip south- 

 ward at an angle of 35 . These ledges mark the position 

 of the assumed northern boundary of division 4. The 

 sandstone, in heavy beds with interbeds of dark shale, out- 

 crops down stream for a further space of about 200 feet 

 (60 m.). Beyond this, exposures cease and no more out- 

 crops occur for a long distance downstream. The sand- 

 stones are lithologically ve y similar to the sandstones 



