10. 
II. 
Mauch Chunk of Pennsylvania.—Stevenson. 
Limestone, light blue, pure, non-fossiliferous, seen.......... 
CNRS Us wick: dP bailcat 1 aR Oka ETER st he's cewh« sivsildces. 
Shale, brownish red, with thin streaks of impure lime- 
Dome, couteimne Der Dye PtOGee. oc wwwel es sce ce eis cioeee. 
Limestone, shaly, impure, bluish, weathering dirty yel- 
lowish-brown, very fossiliferous, containing several species of 
Bryozoa, Derbya crassa, Productus fasciculatus, Seminula 
subquadrata, Spirifer littoni, Phillipsia stevensoni?, fish 
tooth. The Spirifer and Seminula are almost invariably in 
BOUATELCCL VRUNEEIE A als Putte we a a Gta alee OU was Cae Ke 
Limestone, very hard, bluish, appears brecciated on the 
weathered surface. No fossils. This is exposed for a con- 
siderable distance in the field eastward from the quarry..... 
Shale, reddish brown, thinly laminated, appears to be 
non-fossiliferous except in one inch of impure limestone con- 
MAE LIKE YG. ANG DryOSOW oars sei dice tec s Avie ons vo wore 2’ to 2’ 6” 
Limestone, varies at expense of underlying shale, lower 
portion very irregular, impure, tends to be flaggy, reddish- 
brown, weathering rusty yellow; upper and more persistent 
portion is more compact, bluish but weathers rusty yellow, 
Fossils very abundant. Productus cora is not found in the up- 
per portion and is less abundant than P. fasciculatus in the 
lower portion. The topmost layer, two inches, is crowded 
with Derbya associated with a few specimens of Seminula. 
Crinoidal stems abound in the upper portion. The forms 
are Zaphrentis spinulosa, Pentremites elegans, Bryozca, Or- 
biculoidea, sp.,Derbya cra sa, Productus cora, P. fascisulatus, 
Seminula subquadrata, Spirifer littoni, Martinia contracta, 
Dielasma turgida, Allorisma, sp., Bellerophon sublaevis, Phil- 
lipsia stevensoni?, fish remains. A small Orthis and a nu- 
culoid shell were obtained but were mislaid. The Seminula 
attains large size and the Spirifer is coarser than in lower 
Rs See Tee cle cairn cies is ie MARGE ne Se nie Rw e TS ei 
Shale, laminated, reddish brown, contains P. fasciculaius in 
REN RIAL E Sy o croie.c 20 G biy's Reis hntw' aid d'ocn Spek ai teen ate cee Posws one 
Limestone with thin shale. This is the top of the quarry 
wall. On fresh surface, reddish brown, compact, tough, but 
irregular and shattered on long exposed surface, impure and 
not used for lime. Contains Zaphrentis spinulosa, Derbya 
crassa, Productus cora, P. fasciculatus, P. sp., Seminula 
subquadrata, teeth and fragments of fish bones............. 
Limestone, same color as last but evidently more compact 
and less impure, It is very tough and is exposed only in 
the quarry wall. Pyrite is present in blotches one-fourth 
inch to two inches in diameter. Crinoidal stems up to one 
inch in diameter abound. Derbya, Seminula and Spirifer oc- 
cur occasionally, but for the most part fossils are rare...... 
