Discovery of a Bone Bed at Phenizxville, Penn. 47 
strata of dolomitic sandstone as to give it the appearance of an 
osseous conglomerate or bone breccia. 
Tn some instances the casts only of the teeth remain, the sub- 
stance of the tooth being converted into dolomite but retaining 
the exact form of the tooth with the sulcations as distinct as in 
the original, twenty teeth of probably three or four genera of 
Saurians, all converted into dolomite! occur on a piece of sand- 
stone 6 by 3 inches. It is a singular fact, that while the teeth 
are dolomitic casts only, the bones in the same stone remain 
unchanged, retaining their original structure. 
Associated with the above fossils in the sandstone are numer- 
ous plant remains, mostly of a broad suleated stem without joints 
or branches, as far as noticed they retain the same width their 
entire length, and are from one half to two inches broad and 
terly Journal Geological Society, London, vol. x, p. 472, and 
vol. xi, p. 871, and referred by them to the lower Jurassic age. 
The following is the descending order of the series according to 
the observations of the authors: 
1, — ferruginous sandstone, sometimes hard, with iron bands, and 
plants, 
Fruits and seeds, numerous and undescribed. ‘ 
aves, Conifer, Zamites, Poacites and Ferns, (Pecopteris, Glossopteris, 
Teeniopteris, Cyclopteris, Sphenopteris). 
Stems, exogenous and endogenous. : 
Acrogens, Aphyllum, Eqguisetites, Phyllotheea, Vertebraria. 
- Red shales 50 feet, green shales, 30 feet. In the former of these there 
were observed at Korhadi :-— 
Reptilian foot tracks, 
Worm tracks, and intestine shaped evacuations, these were also found 
les 
co 
> 
White and colored dolomitie limestones. 
Bituminous shales with fossils. 
Sandstone. 
Indurated clay stone. 
Green shale, 
Bituminous shale with fossils. 
