490 H. M. AMI — THE GEOLOGY OF QUEBEC. 



Similar strata were observed farther along the Citadel front, where the 

 landslide took place in September, 1889, and along Champlain street by 

 Saut-aii-Matelot street, Sous-le-Cap street. Cote d'Ambourges, and St. Charles 

 street, where the dips observed showed clearly that round Cape Diamond 

 the strata, as Sir William Logan noted,* form a synclinal basin at Quebec. 

 Alongside and up Mountain street a bold cliff of conglomerate occurs, con- 

 taining large bowlders imbedded in a shaly and calcareo-argillaceous paste, 

 with the admixture of quartz grains. This deposit, as well as most of the 

 exposures in Quebec city, deserves very special attention and will no doubt 

 afford interesting notes and material. The Corynoides band which occurs at 

 the Cove field and near Montcalm market was again noticed along St. John 

 street in excavations on the lot where numbers 71 and 73 of that street 

 occur. . Dicellograptus sextans was collected here. The strata dip at an angle 

 of from 40° to 70° southward, increasing in intensity toward the northern 

 end of the lot, close to St. John street. 



Review. — So far the fossil remains, while numerous and many of them 

 well-known "Hudson River" forms, are but little known and require de- 

 tailed study. 



Before assigning a definite position to the rocks of Quebec city in the scale 

 of terranes in America, it is necessary for the writer to state that so far he 

 has been unable to find any evidence in the field, either stratigraphical or 

 paleontological, whereby the Hudson River rocks and Lorraine shales, as 

 originally understood by Emmons, could be correlated and referred to the 

 same or an immediately following geologic terrane. 



The fossils collected at Cote d' Abraham have a decided lower Trenton 

 facies, as the presence of Solenopora compacta, or a variety of this species, 

 seems clearly to indicate. From the long list of species obtained in the 

 Montcalm market rocks it can readily be seen that we have there repre- 

 sented a fauna which has never yet been found either in the Lorraine, Utica, 

 or Trenton terranes — a fauna distinct from the faunas included in these 

 three terranes, whose characters are so well known throughout the continent 

 in their undisturbed and complete development. It is the same fauna which 

 has received in numerous places the name " Hudson River," e. g., at Nor- 

 manskill and many other localities in New York and Vermont, and in 

 Canada, at False point, Island of Orleans, on the Etchemin river between 

 St. Henry and St. Anselme, at Drummondville, on Crane island, Gagnon's 

 beach, the Marsouin and Gros Male, a mile and a half below the Tartigo 

 river, at Griffon cove, and in many other localities. Similar strata have also 

 been observed in northern Maine, in Newfoundland and New Brunswick. 



Now, the question presents itself: What is the age of these rocks and what 

 the horizon to which the internal fossil evidence points at those localities 

 where this fauna is found ? A number of vexed questions arise. But, tak- 



* Geology of Canada, 1863, p. 230. 



