r ' 
1 
P * 
I 
I 
- -— -TTz* 
\ 
/■ 
In Big Creek 
30—40 M 
Under foot bridge 1 mi.W* of main 
bridge in Brooklyn. 
6” 
2" 
4" 
about 3 ft. 
0-l« 
about 22" 
3lack sh. 
Alternating green 
and black sh. 
black sh. 
greenish sh. 
black sh. 
green sh. 
black sh. 
2” ss-and green sh. 
s&.as below - slialy flags 8-9” 
green soft sh. 
blaxk more or less fissle sh 
s '.•;••••• -. •• 
^ ;. r . 
soft green sh. 
Vc« -V - • 4 . 
fine ss.,dark-gray 
black sh. 
This interval expands 
in 1 mi.SW* to o' 2** 
<! ( k 
12-15 ft .more or less ss.and sssh. 
upper part sandy plates 
fewer than in middle and basal 
thirds. At brickworks -J* mi.E. 
of bridge and in cuts E.of that 
ss.layers are more prominent than 
J 
"/.V- 
\ 
under bridge 
v 
/ 
8 or 10 ft. almost wholly of 
soft blue sh. chieflv in 
brickworks. 
25-35 ft .mostly soft blue sh. 
in brickworks and bluff along 
creek. Concretions abundant. 
4- mi.up stream these beds are 
Beautifully shown in bluffs. The 
whole becomes more sandy in this 
direction and apparently thicker, 
\ sand layers (some of them bluish 
and calc.inside,brown outside) 
\ being prominent, and in part pre¬ 
dominant rock through thickness 
of 25 feet beneath base of Cleve¬ 
land . 
numerous conodonts,ceratiocarids 
(cf.klumulites of Whitf.),and many re¬ 
mains of plants. Apparently a shallow lagoon-like depression in which 
surface regolitli ana new bl.sh.deposit is mixed and fused. 
Valley of | 5* 2” from contact to first ss. (see note above) 
. Big Creek. 
_ 
Contact between Cleveland and Chagrin is abrupt and nearly even line that is difficult 
to see in clightly weathered cut or bluff. On close insj^ection the line is sharply traceable 
with slight to 2 inch undulations. The depressions are filled with granular dark-gray 
material - some grains appear to be of rounded quartz, others and perhaps majority are of 
minute golbules of pyrite. Just above top line of shallow depressions the sh.is ? the usual 
fine-grained black or very dPark-gray type comonlv spoken of as black shale. 
oa ? e con ^ act shows m similar manner in bluffs along creek above bridge to second wagon 
bridge, thence up creek to -> mi a above wagon br. which i 3 on U.-Y/.road 1-4 mi.W.of S. Brooklyn 
where contact is at water level. * _ , 
At last place .centact. plane, sinks some 6-lOinches and is fused in a single layer,which 
e specimen).The 6-10 inch 
w t V Y ^ w x v cl « wctiiCi Lcvoi. 
* 0 last place ^contact plane sinks some 6-10inches ___ „ _ 
dpnfSfabove,the contact an uneven plane(see specimen) 
depression is filled with somewhat granular 2)1.sh. cont? * * 
lining many small flakes of mica, 
