176 NEW YORK STATE MUSEUM 



Farther east the thickness of the Stafford limestone is shown 

 by borings in various salt shafts to be 1.8 feet at Leroy; and 

 in Livingston county, 4 feet at York, 1 foot at the outlet of 

 Conesus lake, and 2 feet at Livonia. Westward the conditions 

 appear to be somewhat different, for at the Plumbottom creek 

 locality, only about 30 miles west from Stafford, the thickness 

 is 8 feet 4 inches. The only locality between these places at 

 which the Stafford limestone has been observed is at Wende 

 station on the Lehigh railroad. The contact between the lower 

 Marcellus shales and bed I is well exposed on the left bank of 

 the stream opposite the station. Large boulders, some of which 

 belong to higher beds of the Lancaster section, are scattered 

 along the stream channel to the southward for a distance of 

 ■J mile or more but there are no exposures from which the thick- 

 ness of the limestone could be estimated. An outcrop supposed 

 to be of this Stafford limestone occurs on the farm of Martin 

 Martin ^ mile east of Alden Center, but this proved on exami- 

 nation to belong to the Onondaga formation. The exposure is 

 due to the removal of the surface soil over an area 3 or 4 yards 

 square, and the rock has been blasted, fragments of it having 

 been thrown out on the surface. The rock resembles the 

 Stafford limestone lithologically but the fossils are mainly 

 corals of the genera Favosites, Zaphrentis, Heliophyllum and 

 Blothrophyllum, B. promissum being the most common 

 species. The following are a few of the fossils observed at this 

 locality. 



Zaphrentis prolifica Billings 



Z. gigantea (?) Lesueur 



Z. herzeri (?) Ball 



Z. sp. 



Blothrophyllum promissum Hall 



Cyathophyllum (Heliophyllum) juvenis Rominger 



Heliophyllum corniculum (Lesueur) 



Favosites epidermatus Rominger 



F. hemisphericus Troost 



