J. D. Dana— Geology of Westchester County, N. Y. 331 
N. 13° E., 90° about; 250 yds. N. of dys m. gn. N. 26° E., 85° W.; near N. 
— ue this schist on Arcularius St. and same Av., m. gn. N. 20° E., 90° +, and 
yds. more to W., N. 19° E., 70° W. v3 symbol wrongly makes it E). 
ea ae N. oof Fleetwood Park, i. (continuation of that of the bshog! aes tare 
corresponding to 5 symbols, N. 22° By OOo Ngee. vi a +; * E., 90° 
N. 19° E., 70°-80° W., N. 19° E., 80° W., the last ae re he gneiss 
oe little le beyond line of Arcularius line: here ‘the rico p Pee ihe of Area 
AREA No. 2 AND ITS VICcINITY.—C th h $ mile N. of Manhattan 
House ° . map), on Central Av., tal ae Mm. gn. N 8 32° B., ime E.; 300 
oa f same house on argo te m. gn. N..27° B., 65° E.; 100 yds. ~~ of 
hice on road going m. gn. x. 30° E., varying, 55°-60° fi. and 400 yds. 
fartict W., N. 30° i, 66° ~70° K.. varying; 400 yds. N. W. of Club pps A ye oe 
ee m. sch. N. 28° E., 50°-60° E. ; [800 ds. S.W. of same, oe E., 
barn), x 2° E., 60° W., N. 2°-12° E.; 45°-20° E., undulating : geet to ae - 
T-symbo is, N. 17° E, 60° W.: N. 12° E., 60° W.. N. 27° F., 60°-65° W., d 
E., 70° 65° {the last near bottom of valley west of Mt. Eden region); redid 
near last, N. 21° 
Near head of Cromwell's sa Bge v0 = of lower ope ved Central Av.). — 
hes Central Av. crosses the ook, on road -W., m..gn. N. 
°-19° E, 60°-65° Rs 'Y. 14° i ee? ily some ine lea tay sade _ nye WwW. Ae 
sea, near house, N. pees K., 65°-70° W.]; li o 8. on Cen 
side, m. gn. N. 31° E., —East of brook Bee vat Smith’s Hous) i x 
24° E., 40° E.; N. 27° z, ioe 40° E.; more to E. near igi 
60°-65° E.; and E. of last, m. gn., N. 21° t, 65°-70° EB. (the Sade’ of he 
two observations wrong in the stem jointing W.).—W. of middle of poggadee 
Creek, anit Av., W. side, m. gn., N. 23° E., 65°-75° E.; toS. of last, N 
E., 80° W. to 9 
of S. part it Cromwell's a on Ist St., 2 N. 16° E., 90°+; 225 yds. to 
NE. of beige thick bedded 1, N. 16° E.; just z of last, gn. N. 15° E., 80° W. 
i 90°—W. of S. part of same tick. at W. end of bridge, m. gn. N. 20° E., 
tor : i i. 5 
McComb’s bridge, m. ag in zigzags N. 28° E., 80° W. to 80° E.; on Central Av. 
150 yds. N.E. of sa pv dip 60° to 80° W. On Hudson River, W. of 
end of same ide, 5 5 yds. W. of the Av., i ii 7° K., 80° BE. to 65° E., and 
120 yds. to N., near same river N, 27° B., 15° 
: 0. 3 AND 1TS VICINITY.—At Kingsbridge, on R. a 1. N. 37°-40°E., 60° EK. ; 
just W. Py the limestone a on R.R., m. sch. or m. gn.. partly hole. N. pie > 
65°-70° E.; 250 yds. W. near bridge at t W. side of the “bend in Sp. Du 
m. gn., N. 56° B., 70°-60° W. (here layer of “actinolite tc.). W. side of Tibi 
Brook, 4 to 5 miles N. of Kingsbridge, m. gn. N. 1 PE, 60° E. 
Arga (No. 3A) NORTH OF SPUYTEN a a TO RIVERDALE, ON THE Hupso: s 
—At Spuyten Duyvil, near old R.R. station, m. gn. N. 40°-75° E., 35 wae E., 
i 0 
“d varying widely; 60 yds, . N. 50°-37° B., 45°-50° E.; 50. f 
forking of R.R. above same R.R. stati Book we : , 70° B.; about 
200 yds. N.N.E. of last, and as far from rive » N. 47 
K.; on Whiting estate, S. of F. of an old timekiln, ae “rte, "N. 1" E., 70 E., " but 
varying in strike and dip; 250 yds. N.K., gn. of E. side of 7 area, part hoe, : 
4-8" E., 55°-60° E.; [S. of Delafield’s, gu., part hble., x : 10° E., 60 ban 55 
E.]; W. of arge quarry of 1, tremolitic, N. 10°- 10 
: - of same, | a y 
E. of Riverdale station, N. of 4. area, m. gn. N.3 30°~34° E., 65° KE TSE. of Mt. S. 
Vincent gro unds, quarries of m. gn., N. . E., 60°-55° E. ; on R.R. near Mt. St. 
Vincent depot, N. 17°-22° K., 55°-65° E.]. 
AREA 4.—S. of W. Mt, Vernon $ mile, W. piled voto 1. N. 29° E., 70° B.; E. 
of R.R., 1. same; E. Of ty thin gn.., — * ridge between W. Mt. Vernon and Mt. 
Vernon, thin gn. N. 21°-25° K., 70°-75° B,; on N. Y “RR, below Mt. Vern rns, 
thin or m. gn. N. 4° a570k Wik at W. Mt. Vermon, E. of R.R., m. gn., 
