136 
JOURNAL OF THE GEOLOGICAL SOCIETY OF DUBLIN. 
Green grit,. 
Brown,. 
Green,... 
Brown,. 
Green grit,. 
Brown,. 
Green thick beds of grit, ......... 
Brown,.. 
Green, gray, and brown, confused,. 
Brown,... 
Green, .. 
Brown slate, including three yards of brown grit, . 
Green,. 
Brown,.. '. 
Green,. 
Brown,. 
Green, ... 
Brown,. 
Green, .. 
Brown, ... . . . 
Green,. 
Brown,.... . . 
Green,... 
Brown rock ends, .. 
Cutting ends at 400 yards from the bridge. 
3 yards. 
6 
8 
5 
5 
4 
5 
n 
55 
55 
55 
15 
15 
9 
2 
8 
9 
26 
14 
25 
1 
1 
13 
21 
11 
1 
1 
3 
3 
71 
15 
55 
11 
11 
11 
1? 
51 
11 
11 
55 
55 
55 
11 
55 
55 
Thus we find in this section of 360 yards in length, twenty 
bands of brown grits and slates, and nineteen bands of gray and 
green colour alternating with them; so that the colour of those 
gray, green, and brown grits and slates goes for nothing as an 
argument to prove the age of the rock. 
Many other sections interesting on this part of the subject 
occur in the country. There is one in a quarry at Commons, half 
a mile north of Cork, on the Blarney roadside, worthy of a visit, 
and a fine section in the railway cutting at Bathpeacon, two miles 
north of Cork, in which the alternation of green and brown colours 
are visible, as well as occasional examples of a bed, or a band of 
rocks, being of the one colour near the surface, and passing into the 
other below, where the strata stand nearly on edge. 
