86 OSCAR SEE VERE SEE Va 
brown carbonaceous silt, 30 to 60 feet thick. I have no doubt that 
the core of this ridge and presumably of many others in this region 
is ground moraine. I am surprised and puzzled by the invariable 
presence over the till, even in the axes of the ridges, of stratified 
carbonaceous silt. I cannot distinguish between this silt formation 
and that which in places forms plains between the ridges. It is. 
probable that only one silt formation is present, and that it has an 
attitude similar to the loess formation in the Mississippi basin, 
mantling an undulating drift plain. Therefore, the theory that it is a 
lagoon formation must be abandoned. 
(At the upper edge of the bank, on the north side of the ridge south 
of the lagoon, I found the pelvis of a large animal. It was 8 feet 
wide. It had evidently been embedded in the soil at the surface of 
the silt formation.) 
A headland about three and one-half miles northeast of the 
mission presents a 100-foot sea-cliff at the base of which, in places 
reaching up to 20 feet, occurs the blue-gray till abounding in glaciated 
boulders, some four feet in length. ‘They consist chiefly of gabbro, 
metagabbro, pyroxenite, greenstone, diorite, gneiss, schist, marble, 
limestone, and fine-grained sandstone. The overlying non-pebbly 
carbonaceous silts form the greater portion of the cliff, but are not 
well exposed. 
Three-fourths of a mile farther northeast, the cliff in a headland 
is only from 30 to 50 feet high, yet the boulder clay reaches up to 
20 feet above sea-level. Boulders from one to three feet in diameter 
are relatively more abundant than at the outcrops before described. 
The largest is a dark green altered fine-grained basic volcanic rock. 
At “the cape,” the bold headland five miles northeast of the 
mission, that forms the most northerly point of the peninsula, although 
the sea-cliff is probably 150 feet high, the silt is so thick that the 
boulder clay does not appear to extend more than about 15 feet above 
sea-level. From the top of the cliff looking inland two peculiar depres- 
sions can be seen. They are occupied by lakes which may be 
between five and ten acres in extent. The northern side of each is a 
low valley plain, but the southern side is a crescent-shaped steep 
bluff. The abruptness of this bluff contrasts strongly with the 
flowing contours of the neighboring country. It is possible that these 
