. "CMBH"@en . "About 1840m"@en . . "Beacon Hill Tuff Formation [Obsolete: use BHF, CMBH]"@en . . . . . "Probable sharp contact, at base of Benscliffe Breccia Member, on grey-green, laminated, fine- to medium-grained volcaniclastic beds of the Blackbrook Reservoir Formation."@en . . "Beacon Hill Formation"@en . "Tuffaceous-mudstone, tuffaceous-sandstone and tuffaceous-siltstone with subsidiary tuff and volcaniclastic-breccia. Stratified bedrock. Occurs onshore. Deposited during the Ediacaran Period (Precambrian) (635-541 Ma BP)."@en . . "541.0"^^ . . "Varied sequence of grey to blue-grey epiclastic and tuffaceous mudstones, siltstones and sandstones with subordinate volcanic block-breccias and lithic-crystal tuffs."@en . . "Sharply overlain by Bradgate Formation beds, of blue-grey, laminated volcaniclastic mudstones, siltstones and sandstones."@en . . "635.0"^^ . . . "stable"@en . "Beacon Hill Formation"@en . . .