li',-_> i;. \\\ ELtS — STRATIGRAPHY OF THE "QUEBEC GROUP. 



of what is known aa the Levis formation. It may here be remarked that 

 no rocks of division 5 have yel been recognized on t lie west or north side of 

 the river. 



The red and green Bhales and greenish sandstones of division 1 are well 

 exposed on the south side of the St. Lawrence from Point I/vis to the 

 Chaudiere river, about seven miles distant, and for about seven miles further 

 on above that stream, to the village of St. Nicholas. Here they are terminated 

 by the fault which crosses from above Cape Rouge and brings the Hudson 

 River into view in an apparently underlying position. On the Chaudiere 

 they form a continuous section with a large development of the sandstone 

 portion from the mouth to the Grand Trunk railway bridge, in which section 

 several folds doubtless occur. Just below the bridge several sharp crump- 

 lings are seen, and in the green shales at the head of the great falls, three- 

 fourths of a mile below, as well as in those directly at the bridge itself, cer- 

 tain bands contain Lingula and Obolella in abundance. On this stream no 

 other fossils are found till we ascend to the vicinity of St. Bernard and St. 

 Lambert, where an overlying area of blackish and grayish shales contains 

 PhyUograptus and other graptolitic forms which indicate a basin of Levis 

 fossiliferous rocks underlain on either side by the shales of the Sillery. 



From Point Levis the red and green shales are well exposed on the roads 

 leading southeasterly towards St. Henry; but a short distance below the 

 former place they are concealed by the graptolitic Bhales which constitute 

 the Lowesl portion of the Levis formation. A line of section running south- 

 east from the lower ferry at Levis, which is one mile north of Point Levis, 

 to the middle Levis fort, about a mile and a half distant, shows the rocks of 

 this portion arranged in a series of anticlinals, of which at leasl loin- are 

 clearly recognizable. Of these the most westerly is seen near the crest of 

 the hill overlooking the river at Levis, in a cutting on the road which then- 

 ascends to the upper town. The structure of this i- clearly an overturn. 

 The beds along the face of the cliff between this point and the old Victoria 

 Hotel at Point Levis show, by the crushed, faulted, and often overturned 

 character of much of the strata, the extension of the anticlinal in this 

 direction. Several of these anticlinals are indicated on the map and in the 



-■ ■•lions published in the Alia- of 1 86 I by Sir William Logan, by whom the 



outcrops of the several bands of limestone conglomerate were carefully 

 traced. The presence of the red shales of the Sillery formation in intimate 

 association with the fossiliferous L6vis beds was also noted, but these were 

 ;i i thai time regarded as an integral portion of the fossiliferous series. This 

 i- a peculiarity of structure which now needs to be explained, and the cor- 

 rect interpretation of which reveal- very clearly the relative positions of the 

 two divisions. 



