Early Pliocene sedimentary deposits are exposed at the surface along the James and York Rivers, across southeastern Virginia. The Zanclean age (5.33–3.60 Ma) Sunken Meadow Member of the Yorktown Formation records a relatively large-scale marine transgression in the Salisbury Embayment. A total of 15 samples were collected from an outcrop near Spring Grove, VA, for grain-size analysis and to d…