Intelligence and Miscellanies. 179 
6. Notice of a curious Fluted Rock at Sandusky Bay Ohio. 
Extract of a letter to the Editor, from Epenzer Gran- 
GER, Esq. dated 
Zanesville, Ohio, July 2d, 1822. 
Tn an excursion which I made last summer, [ observed 
some most curious appearances on the rock ata place cal- 
ied Portland, or Sandusky city, on the Sandusky Bay. 
he shore of the Bay at the town rises about eight feet 
above the water, and ranges nearly east something more 
than a mile, and then turns abruptly to the south. The 
rock appears to be what is vulgarly called bastard lime- 
stone. Ido not know what it would be termed by Geolo- 
gists, but its base is silex in fine grains strongly cemented 
with ime. It contains a great variety of shells, andis un- 
questionably a marine deposit. ia 
In digging the cellars on the front street of the town, they 
come down, through four or five feet of earth, to this rock. 
Its position is nearly horizontal, with sometimes a trifling dip 
to the east, sometimes to the west, but more generally to 
the east. Its surface is fluted, with lines or grooves, in a di- 
rection nearly east and west, and though differing in width 
and depth, perfectly straight and parallel with each other. 
It appears to have been once polished as if by friction; and 
this polish it still retains in a considerable degree. 1 was 
told this rock had been examined by a scientific gentleman 
from England, who ascertained the direction of the lines to 
be, north 71 degrees east; agreeing exactly in this particu- 
lar with a similar appearance, which, as he said, had been 
discovered in one place only on the old continent. 
I examined the bottoms of a number of cellars, and found 
them similar. I also observed the same appearance in the 
rock on the shore ; and in more than one place, | observed 
this fluted rock overlaid by another stratum of similar con- 
Sistence. From the shore to the farthest cellar inland, in 
which I observed these impressions, must be more than one 
hundred feet, and | entertain no doubt that the impression, 
at some short distance farther, is overlaid entirely by anoth- 
er stratum: what its width is, therefore, it is impossible to 
ascertain. 
