6S Geology, ^c. of the Connecticut. 



No. 37. Red slate — As No. 9, but harder and eoarsdi* 

 and less inegular on the surface of the layers. Thickness 

 3 rods, dip 40°. 



No. 38. Same as No. 22. Thickness 20 feet, dip 40<». 



No. 39. Similar to No. 38, but more micaceous and di- 

 visible, into thinner layers; resembles much, certain varie- 

 ties of mica slate, except that the silex has a more earthy as- 

 pect. But it would not be difficult to deceive almost any 

 geologist by labelling hand specimens, mica slate. Thick- 

 ness 2 feet, dip 40°. 



No. 40. Same as No 37. Thickness 10 feet, dip 40°. 

 This carries us to the dam across the Connecticut. 



No. 41. Hard gray sandstone slate — Like No. 22, but 

 more undulating and irregular. Thickness 5 rods, the 

 remaining distance the scale is much reduced. 



No. 42. Very near No. 41, but coarser and not so undu- 

 lating. Thickness 8 rods. 



No* 43. Coarse gray conglomerated sandstone — layers 

 thick. Thickness 12 rods. 



No. 44. Same as No. 40. 3 rods thick, dip 35^ 



No. 45. Alluvion — 20 rods. 



No. 46. Same as INo. 32, about 2 rods thick. 



No. 47. Same as No. 40, 1 rod thick. 



No. 48. Alluvion-^-2i quarter of a mile; beyond this the 

 section is continued on the south bank of the river. 



No. 49. Same as No. 37, one half a mile. 



No. 50. (No. 10.) A sing7.dar fragmented rock-'— -unstratU 

 fied, 20 feet thick, very hard and tough, imbedded frag- 

 ments, chiefly reddish brown quartz, appearing as if it bad 

 undergone the action of fire, a little micaceous, cement often 

 blackish, appearing like veins, apparently ferruginous, rock 

 resembling some varieties of porphyry. 



No. 51. (No. 6.) Dark gray, very fssile sandstone slate — 

 Harder than shale, somewhat argillaceous in its odour, a lit- 

 tle micaceous, surface rough and grit coarse, slightly sono- 

 rous- when struck, 1 rod thick, dip 40°. 



No. 52. Same as No. 50, 1 rod thick. 



No. 53. Similar to No. 39, 5 rods thick. 



No. 54. Alluvion between half and three quarters of a 

 mile. 



No. 55. Same as No. 9, half a mile. 



