A. Wing's Discnrerus in Vermont Geology. 343. 



In this "second fold," No. 4, or the "Ophileta beds," Scoli- 

 tJtn.s in- nidus and the Fucoid Paloeophycus arcuatus are abundant. 



In the same fold, above No. 4, appears No. 5, called the 

 •■'Irihbf/e In 'I "mi ( 'ii'/i/in/ii/rnle.'' It consists below of dark 

 bluish sandstone or quartzyte with green slaty seams containing 

 Fucoids ; then ten or fifteen feet of siliceous limestone, holding 

 a few small Trilobites and other fossils; then a conglomerate 

 made of flat and rounded pebbles from the quartzyte below — 

 the flat ones one to two incht s across, the rounded, from coarse 

 -iioi to large bullets: the paste sometimes limestone; the slaty 

 sevens holding toward the bottom a small 'h-ii,,'.- < (/,■//,/'»;, ,<,), :i 

 st.iali Trihihiir. and, near the top, Maclurea sordida and M. matu- 

 Una in crowded abundance at some places. This "conglom- 

 may generally be traced along the west side of the great 

 slate belt without aid from its fossils." 



At Bascom's Ledge, which is the " fourth fold " going east- 

 ern from Mutton Hill, Nos. 1, 2, 3, 4 and 5 occur, with their 

 basils, and the lower part of No. 5, the " Trilobite " or ''Con- 

 glomerate" bed exists in great force. ' The Trilobites (Asaphus, 

 etc.), and other fossils mentioned on page 341 are from this 

 bed, ten or twelve feet of it being made up almost entirely of 

 them. There is also above the ''conglomerate," No. 6, the 

 "Hhvnehoneiia beds" already mentioned— so called from "real 

 M - [ppoa id in the next (5th) fold." This 



^ ,! - 6 is a nearly pure, or feebly siliceous, or dolomitic lime- 

 ' in grain and softer than the formations below, 

 athering to some shade of yellow, red, pink, or 

 . without fossils in the line of section of the 4th 

 fold. 



Over No. 6 occurs No. 7, the Sparry Limestone, 400 to 600 

 : and No 8, the slate of the great belt, here perhaps 

 m or tOO feet thick. The Sparry Limestone is the stratum 

 that, one and a half miles northa - • afforded 



■ i seemed to prove" its Trenton 

 a ?e: and is the Sudburv rock affording Trinucleus. The slate 

 would consequently be I i : "- 



The formations above recognized are. briefly, as follows: 



b Sandstone. — Potsdam. 



- 



3. ••Subervstailme limesl 





mg Orthoce 

 "Ophileta beds," part of 



Limestone." 

 (hlcijewus. 



5. -Trilobite bed" and "Conglomerate," part of the "Eohan 

 Limestone." — Quebec Group. , „ . - 



6. " Rhynchonella beds " with the " striped stratum, part of 

 theEolian Limestone.— Chazy. 



Am- Jope. Sci.-Thihd Series, Vol. XIII, No. 77.-May, 1877. 



