Mineralogy and Geology. 427 
eet. 
35. Blue, light gray, and — clays, with occasional harder seams whe 
ers of claystone and limest Samé locality 
6 Some ze lamina ed claystone of tight gray color, with more or less cale 
spar nea’ Plow er par Mankatlg. sien a tisk ee 
31. Mitsiiations of dark g mh an blue, soft decomposing argillaceous lime- 
stone, with dark laminated lays, 0 soft ‘shale, co EOF great quantities of 
Fusulina cylindrica, F. cylindrica var. ventricosa, Disci o Manhattanensi, 
Chetetes, and fragments Crinoids ; also,” Choneies Verneu a, C. mucronata, 
Productus * Soe Retzia Mormonii, Rhynchonella Uta, Spe om 
ee. cameratus, “Cladodis verus, ra rh ear . be ae and Synoc 
ecident 
taining fucoidal mar ings, Same locality. 
89. Two layers gray argillo- calcareous rock, separated by two feet of dark 
green and ash-colored clays. The caleareo seeds yar fragments 0 Cri- 
“0 Siti peveis and ales in ste species a el erat as last.....++++ 
t gr 
rocks, than as an ‘ee to group the beds into formations re 
may be expected to preserve their distinctive lithological charac 
throughout areas of any great extent. As this has neces n oo 
th al measures of ‘his region 
Syd * fire eae ae - se Permian above, that it pe 
n which we found no fossils. 
inning 2 ear the base of this section, we find we have in great 
tumbers the following well known and widely ed geo yom 
iz., Fusulina pb ures * Chonetes Verneuiliana, tus splen- 
is ge to oceur only in set 
We have some doubts in 
