CATSKILL DIVISION. 
305 
Terrace No. 4. 
Terrace No. 3. 
121. Grey slaty grit. 
122. Brown crumbling grit. 
123. Grey crumbling shale. 
124. Red and green spotted shale. 
125. Brown crumbling shale. 
Terrace No. 2. 
126. Grey slaty grit. 
Terrace No. 1. 
127. Grey slaty grit, to Kiskatamine creek, 
at the church in the valley. 
Terrace No. 1’. 
128. Grey slaty grit. 
129. Limestone, brecciated and conglomerate, 
two feet. 
130. Grey slaty grit. 
Terrace No. 2’. 
131. Grey slaty grit; laminae of deposition 
distinct. 
Terrace No. 3’. 
132. Dark shales and shaly grits and flags, 
of several hundred feet in thickness, 
embracing from the Ithaca group to the 
Marcellus shales of Prof. Vanuxem. 
133. Marcellus shales, at the stone bridge, 
Caterskill creek. 
Heldekberg division. 
134. Helderberg limestone, at the stone bridge, Caterskill creek. 
The strata embraced in 132 have not been traced out in detail as those above have been. 
Numerous fine sections were observed in the various ravines in the Catskill mountains, 
some localities of which will presently be mentioned; but the preceding and subjoined sec¬ 
tions shew the general arrangement of the strata of the Catskill division. 
Subjoined is a local section of a small portion of the Catskill division, at Post’s mills, in 
Durham, Greene county. 
FEET. mcHES. 
1. Grey grit at the top of the ravine, surface rock,_ 
2. Red shale,_ 4 0 
3. Greenish grit,_ 20 0 
4. Red grit and red shale,_ 15 0 
5. Hard band of red grit,_ 2 0 
6. Red shale,_ 2 0 
7. Hard band of red grit,_ 2 0 
8. Slaty red grit,_ 2 0 
9. Red gritty shale,_ 4 0 
10. Greenish gritty shale,_ 3 0 
11. Reddish slaty grit,_ 7 0 
12. Green band of shale,_ 1 0 
13. Red gritty shale,_ 5 0 
14. Blue limestone, compact,- 0 6 
15. Red shale, and thin band of slaty grit,_ 8 0 
16. Slaty sandstone, some spotted with green,_ 6 0 
17. Green shale, and bands of red grit, unknown thickness. 
Geol. 1st Dist. 
39 
81 6 
