british geological map of the uk geological …british geological survey natural environment...

BritishGeological SurveyNATURAL ENVIRONMENT RESEARCH COUNCIL

(The map shows the major geological units andtheir principalbuilding stone resources)

WWW.bgs.ac.uk

GEOLOGICAL MAP OF THE UK

SEDIMENTARY ROCKS

IGNEOUS ROCKS

METAMORPHIC ROCKS

TERTIARY(sanstone (sarsen))

TRIASSIC(sandstone (red and white)

PERMIAN(sandstone (red) and dolomitic limestones)

DEVONIAN (OLD RED SANDSTONE)(sandstone-purple, red and green)

PRE-CAMBRIAN(gneiss, schist, marble)

GRANITES and other coarse grained rocks(red and grey)

LOWER PALAEOZOIC (CAMBRIAN, ORDOVICIAN, SILURIAN)(metamorphic slates-purple, grey and green)

CRETACEOUS (UPPER)(chalk and flint)

CARBONIFEROUS (UPPER)(Coal Measures and Millstone Grit sandstones)

CARBONIFEROUS (LOWER)(limestones and sandstones)

JURASSIC (UPPER)(ooidal limestones)

JURASSIC (MIDDLE)(ooidal limestones, sandstones and fissile limestones)

JURASSIC (LOWER)(limestones and ironstones)

CRETACEOUS (LOWER)(sandstones and limestones)

AGE(millions of years)

65 my

142 my

205 my

248 my

290 my

354 my

417 my

545 my

2900+ my