"HOAG"@en . "337.0"^^ . "stable"@en . "330.3"^^ . . "Hopton Agglomerate"@en . . "Not known."@en . "Hopton Agglomerate"@en . . "Overlain unconformably by mudstones of the Millstone Grit Group, whoch crop out to the south and west of the volcanic neck."@en . "Intrusive igneous body with transgressive contacts with limestones of the Bee Low Limestone Formation to the north and east."@en . "Agglomerate. Igneous intrusive bedrock. Occurs onshore. Emplaced during the Asbian Substage - to - Brigantian Substage (Carboniferous Period) (337-330.3 Ma BP)."@en . . "Volcanic breccia composed of small lapilli and subangular blocks of dolerite and basalt to 0.6m across."@en . . .