WILLIAMS.] 
LOGAN S CLASSIFICATIONS. 
23 
The classification is given in the index of the chart as follows: 
22. Bonaventure Carboniferous. 
' /Gaspe sandstones =s ~ . , to J- Devonian. 
16. Cape Gaspe 1 limestones = Lower Helderbergi 
15. Port Daniel limestones = Onondaga? >== Gasp6 limestones. Upper Silurian. 
12. Chatte River limestones = Clinton J Middle Silurian. 
6. Sillery = Chazyl ^ , T a ., . 
_ ~ , .: J >= Quebec Lower Silurian. 
5. Calciferous J 
Trachytic granite Intrusive. 
Section No. 11 is defined as follows: * 
This line from the Laurentian of the main land to the north of the Mingan Islands, 
on the north shore of the Gulf of St. Lawrence, passes southeast across the water of 
the gulf to Anticosti, thence southwest across this island to Gaspe Bay, and finally 
south to Cape d'Espoir, on the bay of Chaleurs. Showing portions of the Lower 
Silurian rocks in the Mingan Islands, it exhibits the Middle Silurian in Anticosti, 
and the rocks of the Quebec group, brought up by a fault near Cape Rosier, in Gaspe. 
Reposing uncomformably upon these we have, as in the last section, a great basin of 
the Gaspe limestones and sandstones, exhibiting several faults and undulations, and 
holding in two of the subordinate basins portions of the unconformable Bonaventure 
conglomerate. The length of this section is 161 miles. 
The index of the chart is as follows: 
22. Bonaventure Carboniferous. 
19 ' JGaspe sandstones../ Chemung l Devonian. 
17. J I Onskany ) 
16. Cape Gaspe limestones i Lower Helderberg . ^ 
/ Port Daniel limestones. . . \ Gaspe limest. { 0nondaga (Ludlow) /Silurian. 
15. 
12. 
11. 
10. 
IL'Anse a la Veille limestones. 
Southwest Point limestones 
I Anticosti 
r Clinton 
\ Medina 
Middle Silurian. 
Junction Cliff limestones . 
Hudson River 
9. Utica 
8. Trenton 
7. Birdseye and Black River > Lower Silurian. 
5. Calciferous../ 
4. Potsdam 
1. Gneiss Laurentian. 
The classification adopted on the general map is given on page 18 of 
text, and is in part as follows: 
22. Bonaventure conglomerate. 
Lower Carboniferous limestone. 
Old red sandstone 
21. 
20. 
19. 
18. 
17. 
16. 
Chemung and Portage . . . 
Hamilton 
Oriskany and Corniferous 
Lower Helderberg 
15. Onondaga 
14. Guelph 
13. Niagara 
12. Clinton 
11. Medina and Oneida. 
Etc. 
Gaspe sandstone . 
Devonian. 
> Upper Silurian 
Gaspe limestone .. 
^Middle Silurian. 
1 Geul. Survey Canada. Report of Progress. Atlas. 18G3. PI. IV and text, 7 explanations, p. 26. 
