Unit is named the Hames Member of the Monterey Formation. Consists of siliceous mudstone, porcelanite, chert, and dolomite. Thickness is 2134 m. Conformably overlies the Sandholdt Member of the Monterey; underlies and intertongues with the Buttle Member of the Monterey, Santa Margarita Formation, or Pancho Rico Formation. Age is Miocene. (B1520)
Source: GNU records (USGS DDS-6; Menlo GNULEX).
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