268 DESCRIPTION OF THE 
resting, not only on account of their picturesque appearance, but also as illustrating 
the means by which the Lake is gradually enlarging its southern boundary. Some 
of the arches are circular, but most of them are pointed. In the space of two hun- 
dred yards, at one point, I counted over fifty arches, all possessing great regularity, 
and resting upon pillars almost as symmetrical as though they had been subjected 
to the chisel of the artisan. Through these arches, the waters of the Lake dash with 
every swell, and their unceasing play has hollowed out numerous deep caverns. Two 
caves were particularly noticed, supported at intervals by pillars of all sizes, from 
twelve feet to half the number of inches, in diameter, and forcibly reminding one 
of the descriptions of the celebrated cave of Elephanta. Regular architraves, friezes, 
and cornices are constantly seen, but it is only occasionally that a pillar shows a 
base, as they are sunk beneath the waters of the Lake. Some of the arches are 
RED SANDSTONE; SOUTH SHORE OF LAKE SUPERIOR. 
large enough to permit the passage of a Mackinaw boat. There is generally from 
twenty to forty feet of sandstone resting on the arches, the layers being nearly 
horizontal, and supporting a capping of majestic forest trees, giving to the whole 
scene an exceedingly grand and picturesque appearance. 
e. Indurated clay, overlaid by soil. 
d, d, d. Gravel beds, with some large pebbles. 
c. A bed containing boulders. 
ew eocacnk F&F Ae 
b, b, b, b. Red and yellow sands. 
2 
a. Red sandstone. 
Beyond Bark Point, the shore is bound by hills of red clay and marl, with occa- 
sional exposures of red sandstone at various heights. In the vicinity of Rush River, 
the banks of sand and red clay are high, with seams of gravel and small Seicclidaien 
running through them horizontally, near their summits, while numerous boulders of 
