Manlius Formation of Neiv York. — Schuchert. 173 
resemble the upper layers of the "Waterlime" (Rondout) at 
Schoharie and Howe's cave, to which formation they are re- 
ferred by Prosser. There is here, therefore, very little of the 
cement rock of the Rondout member, none of the Cobleskill 
limestone or the so-called Clinton of the Schoharie section. To 
the south of Indian Ladder, at New Salem, the Manlius (s.s.) 
has a thickness of 45 ft., the Rondout 6.6 ft., followed by 10 
inches of greenish sandstone to coarse arenaceous shale. The lat- 
ter layer Prosser regards as possibly representing the Clinton. 
It is more properly regarded as the invading basal deposits 
of the Rondout as it unconformably overlies the Frankfort 
shales of Champlainic time. 
Bccraft Mt., near Hudson, New York. 
Onondaga, 15 to 20 feet. Esopus and Schoharie, 200 feet. Upper 
Oriskany, about 2 ft. Short hiatus here. Kingston, about 20 to 25 
feet. Becraft, 40 feet. New Scotland, 75 feet. Coeymans, 45 feet. 
Manlius ('including a part of the Rondout), 57 feet. 
Upturned Normanskill shale (Champlainic). 
Sehoharie, Nezv York. 
Marcellus. Onondaga, 49 feet. Schoharie, 12 feet. Esopus, 130 
feet. Upper Oriskany, 10 to 20 feet. Hiatus. Becraft, 30 feet. New 
Scotland, 85 to 05 feet Coeymans, 65 feet. 
Manlius (sensu stricto), 45 feet. Entire Manlius, 92 ft. Ron- 
dout member or Waterlime series, 39 ft. "The passage to the 
Manlius above was quite as gradual as that from the Coralline" 
(Stevenson). In the Gebhard collection of the Brooklyn Insti- 
tute are shown fossils from this Waterlime that are of the Coble- 
skill fauna. These are small globular Favosites, probably 
small colonies of F. helderbergiae' van praecedens, Hederclla 
or Reptaria, Stropheodbnta bipartita, Rhynchonella ( ?) lamel- 
losa and Spkifcr eriensis. 
Cobleskill limestone, 7 feet. It is from this zone that Gebhard 
derived the Coralline fauna described by Hall in Nat. Hist. 
New York, Pal., II, 1852, pp. 321-338, and listed above. 
Unfossiiiferous shales weathering dirty-white, with much nod- 
ular pyrite and barite. This horizon is generally but errone- 
ously correlated with the Clinton. To the south of Gebhard 
creek bridge, Prosser gives the thickness as 19 feet, while 
at Howe's cave the thickness is 24 to 40 feet. On the basis 
of the adjoining sections, the age of these olive green shales 
seems to be Lower Cobleskill. The sea transgressed from the 
south because in that direction more and more of the Man- 
lius and all of the Salina strata are present. To the north- 
ward aad eastward not only the Salina but the lower portion 
of the Manlius as well, gradually disappear. 
