288 GEOLOGY OF OHIO. 
This shaly limestone near the base of the Olentangy shale is immedi- 
ately underlain by a very hard crystalline limestone, which is sometimes 
black, but frequently purplish, containing pyrites in abundance and 
very few evident fossils. It is exposed and quarried just below Waldo, 
in Marion county, but is nowhere wrought in Defiance county. It is a 
persistent layer, and occurs in Defiance county. In the report on the 
geology of Marion county it has been referred to the Hamilton, where it 
probably belongs, and seems to represent the Tully limestone of New 
York. 
The following section in the Olentangy shale will further illustrate 
the bedding and nature of this member of the Devonian. It occurs 
along the banks of a little creek that enters the Olentangy River from 
the west, on land of F. Bartholomew, south-east of Powell: 
SECTION IN THE OLENTANGY SHALE, IN Liperty TOWNSHIP. 
No. 1. Black slate, with black limestone concretions.. ......... es 20 ft. 
‘¢ 92. Blue shale, bedded like the slate, but softer ............ .cscseees OMe 
*« 3. Black limestone, in a broken, lenticular, or concretionary 
WOUUSCYircivcicscese sels osstvees inc uses Uobseescleesnes cestacncciscesmemuatec eases 8 in 
A Mn OATINCVAS MING. ars cnuces sno acdss toeeewaied ios uae us surenmeseentooe man ccaisee seers ai ae 
Oa ACK BIALC eseh discs ceniscelssescidealeces voces otc eeeeee ee sl oreiisa es neetenetmecsctens 2H ine 
PEL OwniS MALS MSATTIOAGS INO: Disseoselcdea secon cemdeeat has tuedeest econ nea ae eset LAs is 
“ 7. Blue, irregular, shaly limestone, appearing concretionary ; 
the same as that washed out of “blue clay” near Waldo; 
COMAVSS) OLN Wa LOGY} S TWA, OIA) COWES) oo60 coq000008 on6n000H0 co004000 4 « 
San GUM ATLAS) NOL Ie Sioudaceses sce beueaceisecelne se uecterud sekerenecieee cece sabceeeentes IQ ” 
Sa OM a SATIN CUAS AN OM Oleic scien caceesisse seae cc ane recess eneecorenacteearenemaemeeieneers See 
oo oN Mie SATMNELASNOn 2, cescverss coccan dsswectenisetecsinesarncesiesscteceneoe eee coerce asi 
Compa SATINC AGIUNOs Ovyocse cesicecsclonetenbe ese osserscceemarcoeestectucectecmemamcetee fae 
Mee OATING FAS INO Ud ceceenunsesionee arise ten er oetancerenn crates ieee carmnemncccnmentcts one 
OS TUR, | (SNGOVS) BIS) INI@): Oy osdoeosboadadoneecocuaee REECE ore CoE nanncn ore eBudan Hoortees lees 
CMA SON SATICAGHNIDS in tise e ease eee camalelnnetceceb ster eltecs sac ofacecmeremcateaaras amen a Ae 
CCST Mo SATILC/LASBNO® 0 .ucee sos tedeve oneudeiwceianecstosmesslennecuemeaucmmmectomecamects 4 “ 
Ci Ga oe - SATNELAG INGOs ails cudk soase.os Guess sec uoues cls atins eatan tenes weapewae cetaceans IEE 
SMW (Mel LATIMER AGUNO LO Lei oncscisecascses cosas oceslceceinenalwocmiloessincomameenccat arenes Lee 
SOUTIR SA SATMNE) AMINO Visca ssicodure eves elsseiaeseseivcsiecencctcinmeaimen nicoaae maniac maees Sia 
$3 11), Sinai GOE WIL $210) cecoce 966066 906500 boatde 640000 0095400000 tgbG00 dooodeo0d 15, © 2 
“90. Hard, dark blue, bituminous limestone, with much chert 
and pyrites; the chert is black, and hard as flint; beds 
three to twelve inches (well exposed) ............c2c000 seseeeees OSGi 
‘21, Thinner blue beds, with vermicular or fucoidal marks, and 
little chert; fossiliferous; sometimes coarsely granular and 
crinoidal, but mainly earthy or argillaceous, and tough 
under the hammer ; within, this is in beds of six to twelve 
inches 00 DOK HOE LOE 000 COS DOHHOH GOTHHHHOS OHHHDLOOH 0900708 0999S HHOS 2008020008 000000 00 
