Geology of the Country Around Chelmsford

2nd Terrace 3rd Terrace Alluvium appears augering Bagshot Beds base beneath Blackwater borehole brickearth Brook brown cent chalky Boulder Clay channel Chelmsford Gravels clayey Claygate Beds close consists Danbury depth district drift east encountered Essex Estuary evidence extensive falls Farm Figure flints formation Glacial Lake Deposits Glacial Sand green grey grey silty Hall Head Hill Hoxnian included indicated interglacial Kelvedon known lithological Little loam locally London Clay lower Maldon mapped margin marked noted occur Oldhaven Beds origin outcrop overlying pebbles Pleistocene possible present probably proved Reading recognised recorded regarded represent respectively rested ridge River Chelmer sand and gravel Sandon sandy clay sequence Sheet showed side silt silty clay similar soil spread Springfield Stock Borehole suggested surface terrace deposits Tertiaries thickness thought Turner Unit upper valley varies vicinity Whitaker Witham Woolwich