34 



would also explain the fact that the Sillery and Levis are 

 much more crumpled and folded than the Quebec City, 

 the latter formation being higher in the block, and so less 

 exposed to friction during transport. It would still 

 further account for the fact that the Quebec City and 

 Levis are exposed only in narrow bands close to the river, 

 whereas the Sillery forms the greater areas to the south. 



BIBLIOGRAPHY 



1. Bigsby, J. T. Geol. Soc. London, vol. I, p. 27, 



1827. 



2. Logan, Sir. W. E. Geol. Rept., pp. 18, 19, 1843. 



3. Logan, Sir. W. E. Esquisse Geologique, 1855. 



4. Hall, James Can. Naturalist, Vol. Ill, 1858. 



5. Logan, Sir. W. E. Can. Naturalist, Vol. V, p. 301, 



1861. 



6. Marcou, Jules On the Taconic Rocks of Vermont 



and Canada, 1862. 



7. Billings, E. Can. Naturalist, Vol. VIII, p. 19, 



1863. 



8. Logan, Sir. W. E. Geology of Canada, p. 225, 1863. 



9. Billings, E. Palaeozoic Fossils of Canada, Vol. 



1, 1865. 



10. Lapworth, C. Transactions Royal Soc. Canada, 



Vol. IV, Sect. 4, p. 167, 1886. 



11. Ells, R. W. Rept. on Part of Province of 



Quebec: Part K, Ann. Rept. for 

 1887-1888. 



The graptolites at Point Levis were described in the 

 following memoir : — 



Hall, James. — Geological Survey of Canada. Figures and 

 Descriptions of Canadian Organic Remains, 

 Decade II. Graptolites of the Quebec 

 Group. 1865. 



