264 



The best exposure of the Lowville with overlying Blaek river and under- 

 lying Pamelia is on the State Road about one mile northeast of Lowville and 

 in the several quarries nearby in the field along the limestone scarp. The coun- 

 try from here slopes southwest exactly with the dip of the rocks. Nothing 

 higher than Black river is exposed. The Lowville weathers to a light drab 

 or dove color, but some of- the layers are darker and occasionally almost as 

 dark as the Black river. The calcite tubes are always present in the Low- 

 ville except towards the base. In most of the layers they are extraordinarily 

 abundant; usually perpendicular within the strata and lying horizontally at 

 the surface. They are probably plants. 



Fossils other than plant tubes are rare. Some of the thinner layers are 

 ripple marked. 



The whole mass of the Lowville must be 30 or 40 feet thick. Very little 

 of the underlying Pamelia is seen. 



The low country to the east and north of the exposure shows bosses of the 

 Pre-Cambrian. and several of these are very near the bottom of the limestone 

 scrap, so that the base of the limestone cannot be far below the lowest expos- 

 ure on the State Road loeallity. 



The Black river (Xeray) is dark colored and lumpy, thick-bedded, weath- 

 ering to a light color but not so light as the Lowville limestone. It is massive 

 in fresh exposure, showing the characteristic yellow streaks and blotches. 



Columnaria, Tetradium and Stromatoeerium are abundant. SiUcified 

 Bryozoa of large size are present. Xear the base Strophomena is common. 

 Leperditia is usually common throughout. In fact, the eharaeterisitcs 

 are practically the same as in the Mohawk Valley and at Valcour Island. The 

 contact between the Black river and Lowville is usually very even and in 

 imweathered masses appears merely as a slight change of color accompanied 

 by the disappearance of the calcite tubes. Sometimes the contact is some- 

 what uneven. It is evidently a disconformity. 



Species from the Watebtown Section. 



A short distance up the river from Watertown a collection was made from 

 the lower Trenton, containing the following species: 



1. Batostoma winchelli spinidosum Dlrieh c 



2. Dalmanella testudinaria CDalman) c 



3. Hallopora ampla (LTrich) a 



