|Name||Belleplain Member of the Kirkwood Formation|
|Geologic age||middle Miocene, Serravallian|
Unconsolidated > Coarse-detrital > Sand (Bed)Sand, fine- to medium-grained, pale-gray to white, somewhat micaceous and woody with scattered shell fragments. Most Belleplain sand is quartz with lesser amounts of feldspar and mica.
Unconsolidated > Fine-detrital > Clay (Bed)Clay to silty clay at the base and sand at the top. Clay, massive to laminated, gray-brown, locally contains abundant diatoms and scattered small shell fragments. Pyrite is common in clayey strata
Unconsolidated > Fine-detrital > Silt (Bed)silty clay
|Comments||part of the Kirkwood Formation (described seperately, but not mapped): Kirkwood Formation (middle and lower Miocene, Serravallian to Aquitanian) - Consists of the Wildwood Member and an informal lower member on the central sheet and the Belleplain Member, Wildwood Member, Shiloh Marl Member, and lower member on the southern sheet. The Belleplain Member is a new member named for beds occurring in a corehole drilled by the U.S. Geological Survey at Belleplain State Forest Headquarters, Cape May County. The Wildwood Member is a new member named for beds occurring in a drillhole at Wildwood Beach, Cape May County.|
Dalton, R.F., Herman, G.C., Monteverde, D.H., Pristas, R.S., Sugarman, P.J., and Volkert, R.A., 1999, New Jersey Department of Environmental Protection, Bedrock Geology and Topographic Base Maps of New Jersey: New Jersey Geological Survey CD Series CD 00-1; ARC/INFO (v. 7.1), scale 1:100,000.
Owens, James P., Sugarman, Peter J., Sohl, Norman F., Parker, Ronald A., Houghton, Hugh F., Volkert, Richard A., Drake, Avery A., Jr., and Orndorff, Randall C., 1998, Bedrock Geologic Map of Central and Southern New Jersey: U.S. Geological Survey Miscellaneous Investigations Series Map I-2540-B, 8 cross sections, 4 sheets, each size 58x41, scale 1:100,000.
Sugarman, P.J., Miller, K.G., Owens, J.P., and Feigenson, M.D., 1993, Strontium isotope and sequence stratigraphy of the Miocene Kirkwood Formation, southern New Jersey: Geological Society of America Bulletin, v. 105, no. 4, p. 423-436.
|Counties||Atlantic - Burlington - Cape May - Cumberland - Ocean|