PAULDING COUNTY. 337 
Zanthoxylum Americanum—Prickly Ash .......c.ssccenseceee severe aposu ee Mill. 
Gleditschia triacanthos—Honey LOcust......... ..o.ceceevecese scovceees TUNE 1b, 
Asimina triloba—Pawpaw ...........sss0 ssescsses Ae eae Ce eeuan yaar tease ese ied Dunal. 
Euonymus atropurpuretis— Wah 00...... ssesssee cernsenes voveveres soseesees soe ces Jacq. 
Carpinus Americana— Water Beech.......0.....c00 sereees HSgunR eA uaaieal ee sc gees Michx. 
Wlhonme sly Sl hiyoy esi, TI, peabce hongasiooncdbado Goboce baded’ G5oKe9 dbno50 ca69K0 HeHeKE Michx. 
Calli; O@olclemtialliS IEC OETIAY coneco 6eddes boocdadd HopHidode eoBuod cciceas Badobuboods L. 
Cercis Canadensis—Judas Tree ............2.+ csoscesas vesoscese socwcsees covees cooes L. 
PYLus COrOMAaria—A PPle.......0. cccesesecsnevce coosensesnes soosenecs sooses seaeee soe vue ilu 
Amelanchier Canadensis—J une Berry .........00ecccessees soccer cenees Torr. and Gray. 
GEOLOGICAL STRUCTURE. 
The rocks that have been identified in Paulding.county range from the 
Waterlime to the Hamilton, including both. The geographical limits 
of each formation, as represented on the accompanying map, are largely 
conjectural, owing to the very unfavorable surface features that preclude 
detailed examination, as well as to the uniformly undisturbed condition 
of the Drift sheet. There is some evidence of the occurrence of a large 
outlier of the Upper Corniferous, or Hamilton, in the central portion of the 
county, or, it may be, a long spur from the main strike of the formations. 
It is disregarded in the coloring on the map. The following arrange- 
ment represents the formations in the order of their superposition, 
according to the nomenclature of the Ohio Survey: 
Corniferous, 
Oriskany, 
Waterlime. 
Of these the New York equivalents are represented in the following 
list.* (See Geology of Delaware County.) 
Tully limestone, 
Hamilton shaly limestone, ] 
Corniferous limestone, 
Onondaga limestone, 
Oriskany limestone, 
Waterlime (of the Lower Helderberg group). 
ASE Sey IE Duin a i BIRO) ire Gn SST ae ATS BAA Devonian. 
The Ohio “Corniferous” is separable into four distinct and well-defined. 
parts, the characters of which are persistent throughout the Fourth Dis- 
trict. These four parts above represented, by New York equivalents,. 
are believed to correspond with well-known members of the Devonian. 
* Tam compelled to say that for the classification adopted in the above schedule. 
Prof. Winchell is alone responsible, as I cannot fully indorse it until it shall be sus- 
tained by further evidence than has yet been procured. The shale which he calls the 
‘Olentangy shale’’ has as yet yielded no fossils, and I see no good reason for sepa- 
rating it from the Huron. The rock which he regards as the equivalent of the Tully 
limestone may be so, but it has as yet been identified by no fossils of the Tully lime- 
stone. Itis unquestionably Hamilton, as I have found in it elsewhere Pterinea jlabella, 
Tropidoleptus carinatus, and Nyassa arguta. 
The “ Hamilton limestone”’—No. 4, of Prof. Winchell’s section—can hardly be re-- 
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