peter franklin rawson, dennis curry, frank charles dilley, john michael ...

13 STAGElhZONE15 DEVON16 DORSETITHAMPSHIRE10 SUSSEX19 KENT20 CHILTERNS21 NORTH NORFOLK22 YORKSHIRE23 NORTH SEA29/25-1 3/29-12hANTRIM25 DERRY26 ARGYLLUpperM a a stric h tia nUpperM a a stric h tia n57 mLowerM a a stric h tia no c c id e n ta lisla n ceo la tad e riv e d faunas inp o st - C retaceousf l i n t g ra v e ls-LTLT Sponge Beds "LTLTLowerM a a stric h tia n96 mMaastrichtian292 m(W hite Lim estone)mucronataI T U C atto n Sponge Bed 1_TLrn_n_N. Antrim Hardground _n_fU "L W hite ~ITL L 's t TLJZChalkup to s e v e ra l m etres ?CampanianquadrataPlanoconvexa BandPlanconvexa BandP lanoconvexa BandCampanian108 mCampanianW hite Lim estoneto 130 mTuronianCenomanianA lbian( p a r s )San to n ianC oniacianp i lu l ate s tu d in a r iu ss o c i a li saorangutnumc o rte s tu d in a riw npla n u sla tala b ia tu sg r a d len a v ic u la rerhotomagensem a n te llid isp a rd e riv e d faunas inp o st - C retaceousf l i n t g ra v e lsUpper Chalkto 33 mM iddle Chalkto 65 mN eocardioceras P ebble BedBedW ilmingtonSandsto 11.5 mCrem ani> w -fo s s i].sTop S andstonesUpper Chalkup to 260 mp re se rv e dUpper Chalkup to ^00 mp re se rv e dh_ nv n t-> , B icavea BedUT Chalk Rock ------------ 1—jJU U T S p u rio u s Chalk RockT_n_nj-MelbournRock to UM iddle Chalk26 - ^1 mPlenus M arlsto 2 .5 mLover Chalk20 - 55 mC hert Beds and GreensandM iddle, ChalkU3 m'M elbourn Rock’to 6 mPlenus M arls1.5“ 3 mGrey Chalk30-38 mO rbirhynchia m a n te llia n a Band 2 mChalk Marl1 0-20 mG la u c o n itic Marl to 3Upper GreensandmUpper Chalkup to 230 mp re serv e dM iddle Chalk65 ” 90 mMelbourn Rock7 m _____Plenus M arls3 - 8 .5 mGrey Chalk36 - 37 mm a n te llia n a Band 2 mChalk Marl10 - 20 mG la u c o n itic Marl to l .hUpper G reensandUpper Chalkup to 130 mp re se rv e d"LTLTL Top Rock TLTLTM iddle Chalk60 - 80 mMelbourn Rock2 - 13 mPlenus Marls0 .75 - 2 mGrey Chalk36 - 37 mm a n te llia n a Band 2 mChalk Marl30 - U2 mG la u c o n itic Marl to U.8 m/Upper//Greensand / G ault/TaplowChalk15 mUpper Chalkup to 110 mp re serv e dPMnTnrTTlT^'"LTLTL C halk Rock TLTLTM iddle Chalk58 - 76 mMelbourn Rock2 - 3 raPlenus M arls1.5m(unnamed u n it)21 - 30 mT o ttern h o e S t. U-5—6•5 mChalk Marl2k mG lauc. M arlCambridge Gd.Upper /Greensand //G aultUpper Chalkapprox. 320 mp re se rv e d“LTLTL Tot> Rock J U U“LTLTL Chalk Rock -TLTLTM iddle Chalki * 6 171_ 7 ----? -----Melbourn Rock1.5Plenus M arls0 .05 mSubglobosus Chalk 10 mT o ttern h o e Stone0 .6 mU.3 raInpceram us Bed 0.8_m_P a ra d o x ic a Bed0.UmRed ChalkUpper Chalkup to 300 mp re se rv e dMiddle Chalkapprox. 112 m(unnamed u n it) 11.5Grey Bed0 .5 mInoceramus Bed 3 mKnobbly Bed 0.1*Red ChalkSan to n ian69IfTuroniantoCenomanian21 mtoC oniacian650 mTuronian190 mCenomanian2lUU U /V/// and~ \s\sy/// G la u c o n iticChalkUpper G la u c o n iticSandstoneto 6.7m? JlJT T L T U rrem anie faunas a tb ase o f UpperG la u c o n itic SandstoneLower G la u c o n itic Sandstonet t n i a i n m i r r a i JYellow S andstones 0 .8 -9 * 7 mG lau co n ite Sandsl.U - 3.7mG la u c o n itic ChalkandUpper G la u c o n iticSandstoneup to 3.7 m0 .9 mc h alk and greensandw ith rem anie faunas(unnamed u n it)up to s e v e ra l m etresLoch A line G lass Sandto 12 mMorvein Greensand0 .3 - 13. k mF ig . 6. Correlation of the UpperCretaceous.In the chart, the number of zones is limitedto those which can be recognized throughoutthe British Isles. Subzones can be recognized,especially in southern England. Thezones are not equal in thickness or duration.Thus each of the zones of the Campanian waslonger than the whole of the Turonian age.The single word name of each zone is thatcurrently used, but the socialis and testudinariusZones are also commonly referredto by the generic names of their indexspecies, namely Uintacrinus and MarsupitesZones.Disconformities are indicated by wavyhorizontal lines, and hard-grounds by castellatedlines. Many, possibly all, disconformitiesand hard-grounds involve condensationand/or a break in sedimentation, butvertical shading is used only where palaeontologicalevidence indicates absence of sediment.Nearly all the units within the columnsare lithological, but occasionally we have inserteddivisions based on the abundance of aparticular fossil, e.g. Mantelliana Band.