"0.116"^^ . "Howe Of Byth Gravel Formation"@en . . . . . . "In the most recent exposures in Howe of Byth Quarry the lower boundary of te unit was a sharp, locally channelled, unconformity on weathered Devonian red sandstone."@en . . "stable"@en . "Gravel with subsidiary beds of diamicton and sand. Typically brown/dark brown and olive grey. Dominantly clast supported with a medium to coarse quartzose sand matrix. Clasts are subrounded and rounded and composed mainly of quartzite (probably reworked from Devonian conglomerates) with sparse metasedimentary rock, granites and grey/black ?Mesozoic mudstones. Red sandstone clasts are present in the lowest part of the formation where it directly overlies Devonian red sandstone bedrock. The gravels are crudely horizontally bedded and interbeds of sand show both horizontal stratification and local planar cross bedding. Both gravels and sands display locally strong staining and cementation by Fe and Mn. Palaeocurrent measurements from cross beds and imbricate clasts is towards the south. Common medium beds of yellowish brown gravelly silty sandy diamicton are present and are interpreted as debris flow deposits. The upper 1 to 2m of the deposit display crude involutions and erected clast fabric indicating disruption by periglacial soil processes. Interpreted as glaciofluvial outwash and debris flow deposits."@en . . "To 13m"@en . "HOBGR"@en . "Byth Gravel [Obsolete: use HOBGR]"@en . "Howe Member [Obsolete: use HOBGR]"@en . . "Howe Of Byth Gravel Formation"@en . "0.0118"^^ . "Gravel with subsidiary diamicton and sand. Stratified superficial deposits. Occurs onshore. Formed during the Devensian Stage (Quaternary Period) (.116-.0118 Ma BP)."@en . . . "The upper boundary of the formation is a sharp, planar, subhorizontal, unconformity overlain by reddish brown diamicton of the Byth Till Formation."@en .