Page 19, Ulrich notebook No* 24. 
Sept. 12, 1915. 
Pacts bearing on Chagrin-Ohio shale problem observed in 
passing westward from Bedford to Beach Park, Ohio. 
(1) There is a definite though often inconspicuous con¬ 
tact between the top of the unquestionable Chagrin and what 
ever rests on it throughout the distance of its exposure. 
(2) At Bedford the interval between the top of the Chagrin 
and the base of the Bedford is about 20* or 24 1 and consists 
practically wholly in its unweathered condition of hard, 
slaty, though not decidedly fissile black shale, evidently 
representing the upper half or more of the typical Cleveland 
In Doan brook the Cleveland has increased to 40* or more. 
The upper 20-25 ft. represents the shale found at Bedford. 
Beneath this come some 8 or 10 ft. with green (and olack 
shale?) interbedded, and including several ss» flags. Under 
this come 10-12 ft. black fissile shale to top of Chagrin. 
These two places are on east side of Cuyahoga Diver. 
West of the Cuyahoga the interval between the Chagrin 
and the Bedford increases continuously. 
In Big Creek, 1 m. west of Brooklyn, the interval has 
increased by underlap addition of at least 40 ft. more of 
intercalated basal beds. 
On Bocky Diver, 1 or 2 m. S. of Kamrns bridge over 70 
ft. have been added making the total of Cleveland -f- Olmsted 
here 110 ft. or so. 
Farther west at Dover Bay, Fagle Cliff, Avon Point jl 
and Beach Park, though full thickness could not be determined,! 
it is evident that still other beds are added to the base j 
from point to point. The total may have risen to 150 or 
200 ft. ^ ® 
(3) On the east side of the Cuyahoga and goind west Irom 
Bedford, greenish shale with S3, flag© are first added to the 
Cleveland as developed in the section at Bedford. These 
greenish sh. and ss. are observed in Doan brook 20-30 ft. 
beneath top. See §2. Similar beds holding the same or a 
little lower position are still recognizable in Big Creek 
but west of this area their place i3 occupied by rather soft 
black shale. , 
Under this upusr greenish zone comes_black shale wnich 
increases ranidly in Big Creek - o ft. go 2 o it. in about 1 
mile. One or 2 flags are present in this but they are no 
east of the Cuyahoga some irregularity or unevenness of ^op 
of Chagrin is indicated 
Chagrin brook {• / Big creek 
(See sketches on reverse.) 
