the over thiny to the east, The L.C. shne therfor lay to the west and the question arise did this sea extend directly across the intervening area all the way to Britain and beyond to what is now the ocean? If this is or, that is, if there was rula of Poseidon, then the Appalachia fissuraline did not arise until the close of Lower Cambrian time. In Vermont it may be that the Red group called Shelburne sandstone, is the direct equivalent of the White quartzite to the south. In the Green Mountains and to the east those directly, the Archean, In the Rutland rally after the Archean comes low join more of white quartzite that gradually goes into a dolomite series of consider- able thickness. What relation these bear to the and of Lower Cambrian ge over the next day purple-free shale series I do not know. In northern Vermont the red sand rock is supposed to be younger than the white quartzite, The red sand rock goes on into a dolomite series at the same time the Third Lower Cambrian Benjamin slate.