114 R. AV. ELLS ON THE GEOLOGY OF 



Next, before reaching the extremity of the cape, beds of limestone conglomerate, with 

 black and grey slates come in. They form a narrow belt at this place, having a strike 

 coinciding closely with that of the shore line on the north, and they can be traced west- 

 ward from the extremity of the point for nearly a mile, containing in this distance several 

 bands of limestone associated with the shales. The strata generally are much disturbed 

 and several abrupt folds are visible. At the end of this distance the beds are broken up 

 and a well defined fault is seen, the succeeding rock to the westward being quartzose 

 sandstone, with green and grey shales, which gradually shade off into red and purple 

 beds, similar to those south of Cape Rosier. Thence along the shore westward towards 

 G-riffin Cove, red, green and black shales, with bauds of s;indstone, are seen as far as 

 Marin Brook, half a mile west of which there is a contact on the beach between these and 

 a series of black shales and limestones, which thence can be followed westward for many 

 miles, and which are highly fossiliferous at many points, containing a fauna characteristic 

 of the Trenton-TJtica horizon. These are the two series described in the Geology of Can- 

 ada, 1863 ; the former under the head of the Quebec group ; the latter as the Hudson 

 River or Utica,' the latter of which along the contact dips beneath the red and green slate 

 series, which contact must be due to a fault of very considerable extent. 



Concerning the age and relative position of the red and green slate series there is now 

 but little room for discussion. They have been clearly shown to underlie the fossiliferous 

 Levis formation, the contained fossils obtained near Quebec from the shales being Obolelln 

 pretiosa, or Lm3[ula, and sponge spicules, while from the conglomerates associated with 

 these Olenellus Thompsoni is obtained. The particulars as to the order of succession of the 

 two divisions will be found in the report for 1888 by the writer." 



The rocks near Cape Rosier, some years ago, yielded fossils w^hich were examined by 

 Lapworth and held by him to indicate the lowest fossiliferous zone of the group. Among 

 these were dictyonema sociale, clouograptus, etc., fossils which pertained rather to the 

 Sillery formation than to the Levis. In 188*7, however. Dr. Selwyn and Mr. T. C. "Weston 

 succeeded in obtaining from the beds near the lighthouse a number of forms which 

 appear to belong more properly to the Levis, and there would therefore seem to be an in- 

 folded area of Levis rocks at this point, or else certain portions of the Levis fauna extend 

 downward into the Sillery. While certain of the Levis graptolitic forms, such as phyllo- 

 graptus, ai'e now known to range downward, the probability at Cape Rosier is, as sug- 

 gested since, like interpolations of newer strata with the older are seen at a number 

 of points westward, as will presently be pointed out. 



Of the three formations seen on the north shore of the peninsula, viz., the Sillery, the 

 Levis and the Trenton-Utica, which we may henceforth consider as their true order of 

 sec^uence, the former is by far the most prominently developed, and as this section is a 

 somewhat important one some details may here be permitted. 



The coast line from Cape Rosier to Marin Brook, about four miles distant, has already 

 been described as occupied, principally, by rocks of the vSillery formation. From this 

 latter place westward to a point one mile west of the mouth of the Marsouin River, a dis- 

 tance in all of ninety miles, the rocks along the shore belong to the Trenton-Utica and, 

 possibly in part, to the Loraine formations. Their greatest width inland is in the valley 



' Geol. Can. 1863, p. 207-70. 



= An. Rep. Geol. Survey, Ells, 1888, p. 54-63 k. 



