LOWER SILURIAN SYSTEM OF EASTERN MONTGOMERY CO. 459 
E> Medium bedded in the lower layers, dark 
blue, fine grained limestone becoming thin bedded 
and shaly in the upper part. Contains large 
manners Or lirigwucletus’concentricus 
Baten, and Monticulipora: (Prasopora) 
lycoperdon Say. FQ’ = E10" 
E* Soil filled with boulders. 30% 02" 
E? Thin warped layers of arenaceous limestone 
weathering buff. Calciferous sandrock. ri: (Ae 
E? Heavy, very compact layer of sandy lime- 
stone. a 
E! Partly covered. Sandrock exposed in bed of 
creek near railroad. 52a 
No. 3 of the above section is doubtless the thin bedded member 
often occurring at the summit of the Calciferous stage. Perhaps 
the 30 feet belong entirely to the Trenton stage. The thin layers 
of no. 5 are excellently adapted to collecting fossils and contain the 
two representative species of the upper Trenton of this region in 
abundance. A short time was spent in collecting at this point with 
the following result: 
1 Monticulipora (Prasopora) lycoperdon Say AA. 
2 Stictopora acuta Hall? (r) 
3 Rafinesquina alternata (Con.) Hall and Clarke (c) 
4 Orthis (Dalmanella) testudinaria Dalm. te) 
5 Rhynchotrema capax (Con.) Hall and Clarke? (rr) 
6 Modiolopsis cf. arguta Ulrich (rr) 
See Geol: surv. Minn. v. 3, pt 2, pl. 36, fig. 6 
7 Asaphus platycephalus Stokes Pa0G) 
8 Leperditia fabulites Conrad (r) 
g Trinucleus concentricus Eaton (a) 
10 Raphistoma cf. lenticulare Emmons (rr) 
II Crinoid segments 
Westward from this point the Calciferous is well exposed along 
the railroad, and an excellent section from the Calciferous to the 
Utica is afforded by the small creek half way between Crane’s vil- 
lage and Port Jackson. The exposure of the Trenton in this sec- 
