August 5-1921, Friday. Spent the entire day along the western side of Lake Bomoseen which is west of Castleton several miles. This is in the slate belt and many quarries one seen taking out purple and green slates. The slate belt gone is probably not wider than 50 feet though in places probably as much as 100 feet has been quarried out. Some days later we saw in the bend of a river that they slate are of the same age. Just above the purple and green quarried slate is a zone about 10- feet thick of slate interledded with thin limestone that range from one to four inch thick. These are always much further apart and jointed into the shales; they are always jointed in many directions and the joints filled with crystalline calcite. These limestones have Loran Cambrian fossils, and still for what maybe Eordiscus (specimens) and I for a form Orstella orana. If these are what they appear to be the age of the rocks is undoubtedly Loran Cambrian,