Description of Sections in Chenango, Cortland, Schuyler 



and Yates Counties.* 



Station I.-f De Ruyter, Madison county. A small ravine on the farm of 

 Mrs. Pamela Burdick, one mile south-east of the village and just east of the 

 road leading due south to Burdick settlement, shows an exposure of Tully 

 limestone, eighty-six feet above the creek level at the bridge ( DeRuyter). 

 The exposure of this rock is seven feet and the outcrop is compact and thick- 

 bedded, the thin beds which in this vicinity usually compose the lower por- 

 tion of the formation not being shown. 



Overlying, with exposed contact, are the black Genesee slates, eight feet 

 thick, possibly covered for a few feet at the top. These shales are arenaceous, 

 scarcely bituminous, non-fossiliferous, without concretions or evidence of the 

 Styliola limestone. 



Above are characteristic Portage sandy shales and sands in thin layers, 

 with " Fucoides graphica " and other inorganic markings, especially a crus- 

 tacean trail which characterizes the horizon through all the more westerly 

 sections. Anlopora annecten.% Clarke, is the only fossil observed. 

 ' .. Among these sands are intercalated thin layers of olive green, homo- 

 geneous, smooth sandy shales, without fossils. These rocks continue to the 

 top of the ravine, which opens on a cross-road. Thickness from base of Tully 

 limestone, as exposed, to road, 180 feet. 



On the upper (south) side of this cross-road is an old quarry (the Burdick 

 quarry of Vanuxem's final report) from which stone was taken for the old 

 DeRuyter Academy. Near the lower part of this exposure the elevation is 

 forty-five feet above the road. The rock here exposed is much softer and 

 more argillaceous than that below, less arenaceous and more slabby. 



This hill-side also bears a smaller, slightly worked exposure a few rods 

 due south. In the main quarry were found Spirifer m ucronatus, var. posterns, 

 otherwise no fossils but Spir&phyton. 



In the south exposure more fossils were found and these about fifteen 

 feet below the horizon of the main quarry; as follows : 



Ph j >(rot<>m<(ria, probably an undescribed species, which may be compared 

 in general aspect to PI. trilix of the Hamilton shales, but is of much larger 



* These sections, made in 1895, pertain essentially to the relations of the Ithaca to ttie Portage fauna. The rocks ol the 

 Oneonta group have not been observed in this region. 



t In making the observations recorded upon Stations I. -IV., I was accompanied and aided by Professor C S. Prosser, of Union 

 College. The elevations given for these Stations are barometer measurements by Professor Prosser. 



6:i 



