Oswego, NY has bedrock from the Ordovician period. Name another city (other than Albany) has bedrock from the Ordovician?

Place the point of the compass on point b and draw an arc that intersects  be¯¯¯¯¯  , using    ab    as the width for the opening of the compass.  hope it

Answer primary waves;

Answerseafloor spreading;

This question has already been answered by someone else.here is a link.  hope that it .