66 Geology, Sc. of the Connecticut. 
16. Reddish gray, friable, argillaceous sandstone 
state-—rregolar, tortuous, disintegrating at the surface, a lit- 
tle micaceous, containing numerous small specks of carbon- 
ate of copper, and sppessidy to be an imperfect copper ore. 
Thickness 4 feet, 0° 
No. 17, Hard, cbse limestone—(No. 14.) Fracture 
dull, containing a large proportion of silex, feebly efferves- 
cing with the acids. ‘Thickness of the stratum only a foot, 
dip 48°, not divisible into layers. This very imperfect and 
smail bed of limestone is the only locality of limestone rock 
I have ever found in the secondary,region north of Hartford. 
No. 18. Gray, Micaceous sandstone slate—(No. 5.) Ir- 
regular, tortuous and undulating, not as easily and as hand- 
somely separating into layers as the red slate, resembling 
some varieties of the mica ola: scarcely argillaceous. 
Thickness 6 feet, dip 40°. 
No. Same as No. 9.. Thickness 12 rods, dip, 43°. 
No. 20. Coarse, reddish conglomerated sandstone—Con- 
taining imbedded pebbles. Scarcely different from No. 13, 
except somewhat coarser. Thickness 6 feet, di 
No. 21, Same as No. 12. Thickness 3 rods, dip 43°. 
No. 22, » mi 
eset coarse, granular, scarcely argillaceous, not separating 
into so thin layers as the red slates. Surface not undulating 
or - gent Thickness 15 feet, dip 43°. An excellent flag- 
ae Se 23. (No. 9.) Soft argillaceous slate—Surface smooth, 
scarcely undulating, divisible into thin plates, easily scrateh- 
ed by the finger nail, and consisting of little else than clay 
moderately indurated. —— 5 feet, dip 45°, easily 
ee rarely micaceou 
No. Gray micaceous satnataise slate—Similar to No. 
os. but RF to the touch and finer grained, more undula- 
ting and divisible into thinner layers, containing vegetable 
remains converted into perfect coal. These were so numer- 
ous in one spot, that I a I had found a bed of coal. 
Thickness 3 rods, dip 40° 
0, 25. Geest—2 rods. 
No. 26. Shale—Color very dark, containing sometimes 
small scales of mica, surface a little nobby, containing 
abundance of sulphuret of iron and spheroidal nodules from 
half an inch to two inches diameter, of argillaceous iron ore? 
