78 TRANSACTIONS OF THE 
12-13. Forming the cliff of High Fall, the bottom 
being the base of the fall. Shaly at top, impure, and 
below becoming nodular with dark gray compact, bar- 
ren concretions and finely crystalline portions, with 
shaly partings. The barren portions have a conchoidal 
fracture. The rock weathers into layers two to six 
inches thick. The fossils are seldom complete. but 
fragments are abundant. 
Shaly portion :— 
Prasopora lycoperdon. 
Zygospira recurvirostra. 
Orthis (Dalmanella ) testudinaria 
Crystalline portion : — 
Prasopora lycoperdon, fine celled 
form, a. 
Diplograptus amplexicaule c. 
Conularia Trentonensis. 
Bryozoan (see also B 14). 
Ambonychia bellistriata 
Trematis terminalis c. 
millepunctata. 
small species. 
Lingula. 
Atrypa deflecta ? 
Nucula levata. 
Resembles a cement rock. 139’ 
Orthoceras. 
Rafinesquina nasuta. 
Bellerophon bilobatus. 
Dalmanella testudinaria. 
Platystrophia biforata. 
Ceraurus pleurexanthemus. 
Dalmanites callicephalus. 
Calymene senaria. 
Orthoceras. 
Plectambonites sericea. 
Monoprion sp. 
Rafinesquina alternata: 
Ptilodictya, fine species. 
Trilobite, s. nov. 
Asaphus platycephalus v. 
14. Second “ Blue-black ” constant layer, rather soft, 
but compact, with abundant Calymene senaria, also 
Asaphus platycephalus. 
141’ 
15. Alternating shaly with recurrent thinner compact 
blue-black limestone bands, extending to the top of the 
chief fall, of High Fall. 
201’ 
16. Shaly, easily decomposed limestone, showing 
crushing ; first found at top of the third fall; fucoidal 
markings indicated on the surface, otherwise barren, 
except for a few Orthis testudinaria. 215/ 
17. Crinoidal shaly layers, without other fossils. 218’ 
18. Layer of light gray, pure, compactly crystalline 
limestone, weathering yellow, first appearing 40 feet 
north of the railroad bridge, south of which it pinches 
out and is not shown at the falls. 
It contains no fos- 
sils except an occasional Orthis testudinaria. 224’ 
19. Crinoidal shaly limestone, a recurrence of 17, ata 
point 700 feet north of the railroad bridge, becoming a 
friable, sandy, crystalline limestone, similar to 18 at 
top. 
22'7’ 
[pDEc. 16, 
9g! 
5’ 
4’ 
