Thursday, June 13 1907. A section was made to ascertain the THICKNESS OF THE LOWER PERRY as exposed just north of the first bridge across to Moore Island. The section begins on the shore at nearly low-tide; the rocks here strike N. 10-12° E and dip W, 10-8° N. The section was run along a line extending W 10° N or along the line of maximum dip normal to the strike. The section begins at some ledge which are covered at low-tide and which include the first exposures N. of the Hill Bridge (about a quarter of a mile). "a" - A continuous series of compact conglomerate with the pebbles mostly the size of peas, very commonly one inch to 2 inches. A very small portion of 1% of the pebbles are as large as 5 inches in thickness. The pebbles are for the most part rounded but an occasional seam a few inches thick line more than half the pebbles angular. These sandstones occur but these are Canisterlike and visibly cap the little ledge of conglomerate. A thin sand stone line (2 feet thick) strongly cross-bedded as found at soft (from the beginning of the section) but this line thins out to nothing 50 feet to the north. A thinner hard sandstone band four inches thick cove a edge at 30 feet. The thin sand is a little more persistent. Dip, 25°. "b" - Covered for 165 feet (110-275 feet). This portion is a much flat course few pebbles & there small. There are no rock outcrops but at the south end we a patch of gray marine clay indicating that the little cover is probably a buried channel running along the strike of the rocks. "c" - The first rocks reappearing are the edges of some red slates which are partially buried in gravel. These continue the same strike (N 10° E) as the preceding and like "a" also have a heavy dip to the west, though the exact amount could not be accurately determined. The slates cover a space of 9 feet (275-284 feet). In color they somewhat resemble the Silurian red slates and like these are also slightly green in connection with spots but are coarser & sounder than the Silurian red slates, and are just so crumbly or flakey. The Perry slates breaking into long ear slabs and being in places nearly "slaty". "d" - A sheer cliff at high tide of conglomerate, the cliff varying from 5 to 10 feet in height. The conglomerate grade downward into the slates in a fairly gradual passage; the rocks immediately above the slates being somewhat stony sand in many places free from pebbles & the pebbles where they first occur are small. The conglomerate becomes more & more massive above. The pebbles are rounded and nearly not more than 1 or 2 inches thick. The bulk of the pebbler are little, rounded white quartz fragments. The size of a pea & forming the cliff of conglomerate along the shore which is also along the direction of the line of strike, we find the character of the conglomerate varying; in place the entire 5 to 10 feet are massive conglomerate. In other places there appears some thin sandstone courses 5 or 6 inches thick and thinning to nothing in the course of a couple of yards. A poor precise reading of the strike over an extended stretch gave N. 12° E, instead of N 10° E. N 12° E represents the real strike of the section apparently.