BLUFF OF CLAY MARL OF MATAWAN FORMATION UNDERLAIN BY MAGOTHY FORMATION NEAR GROVE POINT, CECIL COUNTY.

The ledge is undercut by the removal of loose laminated sand of the Magothy formation by marine erosion.

The text of the Folio states:

The Matawan formation is exposed in the Tolchester quadrangle on both sides of Chesapeake Bay. West of the bay it crops out on both sides of Magothy River, and east of the bay it appears along the headwaters of all the creeks from Fairlee Creek to Sassafras River and on Grove Neck. The bay and the Pleistocene deposits conceal so large an area in the region where the formation would otherwise crop out that the exposures are very small. The best exposures occur on the southwest side of Gibson Island, in the high bluff on the south side of Sassafras River, at the mouth of Lloyd Creek, and at Grove Point. (See Pl. IV.) The Matawan resembles the other Cretaceous formations in having a dip to the southeast which carries it beneath later deposits. It undoubtedly underlies the entire quadrangle southeast of its line of outcrop.