At certain localities the Ar- chaean strata stratigraphi- cally above the Archaelon line etc have been removed dur- ing the period of base level erosion antecedent to Cam- brian times; from the Archaea limestones to such an extent that the latter appeared ex- posed over large areas. One of these area, the largest was that about Franklin Furnace. Another lay south of Sparta Junction. A third lay east of a line running almost N + S through Andover. A fourth lay along The Blendon Mine hill, south of Andover. On the base levelled Archaelon was deposited everywhere in the area under consideration the Cambrian sandstone, usually fossiliferous.