1887. | NEW YORK ACADEMY OF SCIENCES, 29 
DIP. 
At level of the river, on Mr. Jason Cooley’s pro- 
etn ee Cc Cpe once mpororod coe cr Berra nO a IN. 80, Ws 
In lower road, just south of Cooley’s........... 30° HE. 40° 8. 
Opening on Humphrey’s lot......... Reet reierera dca Wise ko) 
Ledge on the slope between the two roads, on the 
west side of the road, and also at northwest 
corner of quarry: lamination rather wavy.. 80° W. 
Ledge at roadside, at the quarry...........0.. 85° W. 
By the roadside at 8S. W. corner of the quarry... ior, Wie 
In quarry, at extreme S. W. corner........ acne 80. W. 
A yard further to east of preceding...........+ Vertical. 
At W. side of quarry, at the quartz vein....... 65, Bia. Giese 
above, 70° W. 
In guarry, 60 feet east of road, a bent fold.... + telow. 94° Bi. 
On south side of quarry, bent fold........... . i eee a re 
EO) Nis He Oar Ol QALY < «4 sce) sie 4 «= sisielele eo viele 60° W. 
In quarry, 100 feet east of road........ sie) alaie sate 55° W. 
Course of veins, 5° EK. and W. of N. Contorted 
layers now intervene, all with high dip to 
the west. InS. E. corner ofquarry........ 50° W. 
Top of quarry, near the middle........ “Fee occe 80° W. 
In quarry, 200 feet east of road, with wavy lami- 
Tew LO ay cheat ore aveiacei/s HEL DACeD ED GaCcon eae : 85° W. 
These layers assume a gentle curve, so as to be- 
come nearly vertical at the bottom of the 
quarry, over 30 feet below. 
In quarry, 240 feet east of road, near site of old 
SHIBIGINYS )opotaf 9 «| oo 2,015 ite <a> sjayalanerni tele Welerardcrcve 87° H. 
8. E. corner of quarry, wavy lamination........ Vertical. 
At upper end of quarry, 270 feet east of road... 80° E. 
Ledge, 15 feet from gneiss outcrop. Vertical, or 85° EH. 30° N. 
Ledge, 2 to 3 feet from gneiss... ...c.eseseee 70° E. 10° N. 
Gneiss, at the line of contact or fault......... 2 007 eelo 7 iN, 
Gneiss, a, yard. further to east. .00..sceccesees HOt ey ley N. 
Gneiss, at a few yards east of line of contact.... 40° EH. 10° S. 
In order to determine the true character of the contact of the 
dolomyte and gneiss at the spring above the quarry at the foot 
of Hast Mountain, I had a trench dug between the nearest out- 
crops of the two rocks, and a good section was uncovered. It 
was thus shown that the eastern limit of the dolomyte had been 
reached, and that the dolomyte lamination passed from a verti- 
cal position to an increasing easterly dip, which, at the line of 
contact, exceeds that of the gneiss by only 14°; the amount of 
the inclination of the beds of gneiss also rapidly decreases, going 
