C orres po I) <1 euce . 
129 
i'xposures are displayed. However, llie inaiille of drift is so iieuvy — 
being from 20 to 50 f,.,-!— that it is dirticull to find exposures of an.v 
great lengtli. One of I liose in cNidenee is I lie longesl within a radius of 
a mile. 
One of the ra\ ines spoken of comes into the \ alley ihrougli the hluif 
from a diu' northerly direetion. It is very broad for alH)ut a (piarler of 
a mile back from the face of the blutl. It then forks, being formed by 
two smaller ravines which come together, one fnuu th(> northeast and 
the otlier from the nortliwest. The bottom of the main ravine is but 
little above tlie levelof the Flint valley, while the tributaries are much 
higher and descend very rajjidly. thus showing their comparatively re- 
centorigin. in the fork l)etween the smaller ravines the rock is exposed 
on both sides at some distance l)ack from the junction. The exposure 
in the northwest trii)ulary is iniu-h the l)ciit'r one and is that which ap- 
pears in the <-\il. This shows alioul t>0 ft., which is not more than half 
the jrngth in \ i<'W. The depi h is 10 ft . il will be sreu from the cut 
that the strata (lip (pille rapidly. The angle is from 10° to Ti". This 
is uniform foi' t he full length of | he exposure and prol);il)l.\ e\icnds to 
the exl renu' enil of I he point, which is not more thiiii ■')<) \ards awa\, 
bill il is hidden by the loi-ss and drifl. The angle of di|i would l)ring 
the inclineil strata lo I he lev c| of I he IxMlom of ihc main ravine just 
below the junction of the tributaries. 
This inclinal ioii of I he strata is ])urely a local leal iire. for. "i.'tor MO rods 
farther up I he i;i vi III', l he same rock appears in a perfectlv hoii/oiital 
position, all hough of course at a higher level. .Mso al several <il her pl.aces 
within a radius of a mile I have seen Ihi'same rock a nd al wav s wit lioiil 
