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Tabb Formation; Lynnhaven Member (VAQtl;0)

Geologic Formation in VA

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Lithology

Silt

Sand

Geologic Age

Quaternary (2.58 Ma ago – 2020)

Geologic Unit Label

Qtl

Lynnhaven Member (Johnson, 1976). Pebbly and cobbly, fine to coarse gray sand grades upward into clayey and silty fine sand and sandy silt; locally, at base of unit, medium to coarse cross-bedded sand and clayey silt containing abundant plant material fill channels cut into underlying stratigraphic units. Unit is surficial deposit of broad swale that is traceable southward from Norfolk; extensive low lands bounded on landward side by river-, bay-, and ocean-facing scarps having toe altitudes of 15 to 18 feet. Thickness is 0 to 20 feet.

— USGS

Taxonomy

Classified As

Geologic Formation