WA VERL Y GRO UP. 7 1 



Barques composed of the same coarse-grained sand rock as Flat 

 Rock Point ; they rise vertically from the lake to a height of about 

 20 feet ; the rock is harder and more greenish than at Flat Rock, 

 more like the cliffs of Hat Point. An impression of a Goniatite 

 and casts of a Rhynchonella are the only fossils I observed in it. 

 The strata at the base of the cliffs are of a darker greenish tint and 

 of finer grain, andj are so undermined by the water that large 

 masses have tumbled over into the lake, or stand like inverted 

 conical masses, as at Hat Point, resembling at a distance barks at 

 anchor. It is from this that the name of the point is derived. 



In the drift masses covering the cliffs, slabs of a calcareo-ferru- 

 ginous sandstone are quite abundant, which are almost totally 

 composed of casts and shells of Rhynchonella camerifera and Cen- 

 tronella Julia, together with a few other shells and stems of bryozoa. 

 These fossiliferous, loose rock fragments were long since dis- 

 covered, but their exact position in the series was not known. By 

 following the sand beach east of Point of Barques, toward Burnt 

 Cabin Point, quantities of similar fossiliferous slabs, but evidently 

 freshly broken from the ledges, are thrown out by the lake ; the 

 stratum, consequently, must be denuded under the water-level, and 

 have a position only a few feet below the base of the cliffs. The 

 reddish, thin-bedded flagstones next below the cliffs of Flat Rock 

 are probably representatives of the same horizon. I found in them, 

 sparingly however, specimens of Rhynchonella camerifera. The 

 cliffs of Point of Barques, at the old mill erected there, recede from 

 the immediate vicinity of the shore, and continue southeastwardly, 

 as a terrace-like bluff of about 30 feet elevation, at some distance 

 from the lake, passing the grindstone quarries and extending to 

 Willow Creek. The low shore belt in front of the bluffs is under- 

 laid by the grindstones which have frequent exposures between 

 Burnt Cabin Point and the grindstone quarries, and beyond them 

 to Willow Creek, with some interruption by sand beaches. 



The grindstone quarries are opened in a part of this shore belt 

 where the rock faces the lake in vertical bluffs of from 5 to 15 feet 

 elevation. A thin coating of boulder drift covers the surface of 

 the level ground extending to the foot of the terrace formed by 

 the cliff rock of Point of Barques, half a mile back from the shore. 

 The layers found next under the drift are thin-bedded, brittle 



