388 W. M. Davis—Becraf’s Mountain. 
observed or not does not appear, nor has there yet been given 
any satisfactory explanation of what was going on here during 
the long unrepresented time. This conformity was found also 
near Catskill in the folded strata east of the Catskill Mountains, 
in Green county (see my paper above referred to). At Rondout, 
Ulster county, a fine, uneven unconformable contact is clearly 
in the upper members, Finally, the strata are folded and con- 
formable with lapse of intermediate members at Catskill ; folded 
conformable and without lapse farther southwest. Other exam- 
ples could be quoted from the Canada surveys. All combina- 
tions of these various elements appear, and ‘there is therefore 
no necessity of su ing unconformity at Becraft’s Mountain 
simply because the limestones there do not belong immediately 
after the shales in the geological series, Moreover, the genel- 
