140 GLACIAL PHENOMENA IN MAINE. 
sides with lines running due north. On the 
same side of the island, considerably to the 
south of Bar Harbor, there is a striking sea¬ 
wall composed of coarse materials, thrown up 
in a line along the shore, formed, no doubt, by 
some unusually severe storm, coinciding with 
high-water. It resembles the well-known sea¬ 
wall of Chelsea Beach. Behind this wall 
stretches an extensive marsh, formerly a part 
of the sea. Somewhat beyond it, on the shore, 
are two very distinct polished and grooved 
surfaces, witli the lines running due north. 
On the afternoon of the same day, I ascended 
Green Mountain. Along the lower part of the 
road the marks run northwest, then north- 
northwest, converging more and more toward 
their normal course, until, after passing the 
first summit, (yid thence upward, thej r lose 
entirely the slanting direction impressed upon 
them by the deflection of the ice about French¬ 
man’s Bay, and run due north again. All the 
way up the last slope of the mountain, wherever 
the rock is exposed, may be seen well-engraved 
flat surfaces of rose-colored protogine, on which 
the scratches and grooves sometimes run for 
twenty feet without any perceptible interrup- 
