Friday Sep.14-1923 Monson-Waterville Hunted for 1/2 hours in the layer slate quarry at Monson but did not get the first trace of definite fossil. Picked up a number of specimens to show the lithology. Then went to the Portland and Monson quartz south about one mile of Monson. These quarries are in a different horizon and the cleavage is more along the bedding planes. There is also hardening here and there and sandstone grains. On the bedding planes we see considerable mud flow marks, and more rarely unmistakable plant fragments like heads of grass. Are these Psilophyton or sea weeds. Raymond got a large slab of gastropod trails - a simple but def. gone about 1/4 mile across an outlier with no sculpturings. There is evidence here in the least suggesting graptolets and from the geographic position of the Monson quarries my guess is that their age is Silurian. The base of the Silurian formed place in the quartzites seen at Attf. The strata in these various quarries stands very vertical, and the quarries go vertical into the earth. As the hanging wall fractures and eventually falls into the quarry (= Creep), they now tunnel and mine out the slate. One shaft goes down to 500 feet.