a 
Geology and Mineralogy. 301 
seeing the Red Sandstone. And from this circumstance arose 
the statement of the absence of this formation from the State of 
New t became a very different matter, however, when one 
Sir William E. Log Andrew C. Ramsay, (the latter now 
Director of the British Geological Survey,) the question of t 
geological age of this great accumulation of strata assu a 
area is colored as the Catskill Group without indication of am a 
cal structure. A similar feature was seen in northern New York; 
* rm of 1871, and has continued till the close of 1874. 
cost the labor of two men for four years. It now presents the 
atpect of a piece of work completed, except that from the erroneous 
maps of the State we are unable to give more than the approximate 
h The work has not only accomplished what was undertaken, but 
a8 proved conclusively the existence (first suspected in 1857) of 
Western limits of the red rocks, in Chenango county, presents a 
Series of nearly parallel anticlinal and synclinal folds ; and the 
inued imit 
prmation probably thins out entirely, before reaching the western 
undary of New Y ia. kill 
€ topographical sketch presents a view of the Catskill range 
from the east side of the Fiotacia river, opposite to Catskill, look 
pe ee the shales of the Hudson River Group; the general tae 
West and southeast is shown, forming synclinal and anticlinal 
folds, of which five synclinals and six anticlinals are included in 
given, 
