98, 110. Red sandrock and quartzite mostly white, alternating pretty evenly. 111. Siliceous limestone or "marble," mottled shades of red..... 112. "Marble," rather gritty, with worm borings.. 113, 124. Alternating layers of quartzite and sandrock 125. Champlain marble. 15 126. Purplish, fine grained shale. 1 2 127. White quartzite containing Olenellus, etc. thickness, some with imperfect fossils..... + 137, 138. Grayish compact sandrock with Ptychoparia adamsi and other fossils.... 139, 157. Layers of quartzite, shaly sandrock. The variety in this part of a section, for it could be much extended, is easily seen by glancing over the list as given. As seen, most of the layers are only of very moderate thickness and layers of different sorts, quartzite, sandstone, shale, or rather shaly sandstone, are continually succeeding each other. There is also much variation in color in different parts of the section. In several of the beds, as No. 112, copper carbonate is found in small quantity, never enough to start a mine. The section given in the above table is taken by going in a general easterly direction, that is, inland from the bay. If we begin at the same Catfish Point and follow the shore northward, we shall find much the same succession in the different layers. Here again I follow Mr. Griffin's notes, although I have been over all the region with him as guide. A short distance north of Catfish Point there is the best exposure of the typical Cambrian sandrock to be found about the bay, or at least on this side of it. Still farther north, near Perch Point, the sandrock changes, becomes more calcareous and dolomitic and forms a bed of marble which is here about fifteen feet thick. In sandrock just above this Ptychoparia adamsi, and, possibly, other species of this genus are found. This is the lowest layer in which we have found these fossils. North of Malletts Creek there is a heavily bedded, light grayish quartzite and above this is another bed of the Champlain marble. Then comes a fine grained, dark quartzite containing P. adamsi, etc. North of this is a conglomerate made up of the marble and quartzite, but no fossils have been found in this. There are two small and two larger dikes which cut through these beds here. From this point to North Beach there are various beds of quartzite. After passing the sandy stretch of North Beach for a half mile, rock again appears, a siliceous limestone of a grayish color. From North Beach to Marsh's Bay the rock is a gritty sandstone containing a little lime, especially those layers highest above the water. Bass Rock, which is at the middle of Marsh's Bay, is a good example of this rock and is of a brownish color where weathered. In several places conglomerate is seen. From Marsh's Bay on the rock is a siliceous limestone with small masses of chert. North of here there is a small sandy beach and then the same rock appears. Below high water there is on the east side of a little bay beyond Marsh's a layer of gray, very fine grained sandstone containing little lime. Where the rock has gone out, or at least is not now present in the clays and sands, Pleistocene shells, Macoma fusca and Saxicava rugosa mainly are found. Above the fine gray sandstone mentioned, which also occurs on the west side of the little bay, Salterella occurs in a reddish sandstone. From here around to Eagle Rock the Champlain marble is well exposed, the beds at the rock being 40 feet thick. Just north of this cliff Utica appears. Above the Utica is a smooth breaking limestone, which is identical with that underlying the Champlain marble at the Wakefield quarry. There are four dikes here within a short distance. This limestone was formerly burned for lime. Near Gale's brickyard at Clay Point and for a short distance be |