At the north west end of the St Albans beds there is a critical fault plane that runs at right angles to the strike of the beds. The main movement here is like the San Francisco fault, that is hori- izontally. The Permian has moved northeastward and practically horizontally, on the Ordovician. The fault face is striated. Professor Broadmont will describe for me the fault face and its significance. He holds there is nothing in the structure to disprove my idea of Helicophyria transgressing over the unrefrained Ordovician. I further held that the movement here over the Ordovician is due to shortening of the cyclone fringe the land Lower Permian to push northeastward over the Ordovician. Broadmont seems as objection to this conclusion. The red shales in the higher St Albans has T. almyridalis, In the lower third of the St Albans occurs Byxipidula creynanensis, large and small up to 2 inches across. Here are a little high occur limstones, reflets and Ostracods.