384 J. D. Dana—Audson River Age of the Taconic Schists. 
miles west of Hopewell I obtained specimens looking closely 
like the Wappinger Valley Chetetes, but with its structure lost. — 
Between the Wappinger-Valley and Fishkill-and-Millerton 
belts, there are other outcrops of limestone. 
ne area, nearly six miles long, lies between the northern 
ends of these belts, in the Shekomeko Valley. (See the map.) 
Winchell’s Mountain bounds it on the east, and Husted station 
is toward its northern extremity. The limestone is similar to 
that of the Fishkill-and-Millerton belt, but has in many parts 
3. a delicate bedding that 
companying figure (from 
a photograph) represents, 
natural size, figures on @ 
stone, from a ledge near 
Shekomeko Station (.Sh.), 
which are of white calcite 
and similar to those al- 
ed t 
‘ ee Another specimen con- 
tains a group of black curving surfaces, which are unques- 
tionably of organic origin, and look like impressions of a 
obi I road. 
nother area exists just below the Verbank railroad station, 
where two small hills of a badly rifted, quartz-seamed, gnarle 
limestone occur, which is various in strike, but mostly nearly 
north and south, and is without continuation at surface either 
north orsouth. A third occurs at Arthursburg, hardly eight 
miles south of Verbank. I learn from Professor Dwight, that 
a ledge, 1,800 feet wide occurs two miles southeast of Pleasant 
Valley. Mather mentions one between Redhook and Milan. 
Over the country between the two Dutchess County limestone 
belts, the dip, excluding some local exceptions, is eastwa 
(mostly between east-by-south and east-southeast) and the beds, 
as has been stated, are all conformable. It is true that the 
cleavage of slates is not always conformable to the stratification ; 
but since over this region the lamination in them corresponds 
in all cases with the bedding of the many intervening limestone 
strata, the uncertainties which are thus introduced do not affect 
the above general statement as to conformability and eastward 
dip. Ina ink a to this paper, the actual dips and 
courses observed, will be given. 
Rocks.—The schists and limestone east of the Taconic Moun- 
tains are more crystalline than those west, and the crystalline 
