( Trochidae to Turritellidae) Middle part Eastern area X --- --- -- ---- -- --- -- -- -- -- -- . ?sp. -- -- --- ----X6 X X6 X -X --?I > > >-- -. ------X -- GEOLOGY [For explanation of symbols see p. 46] Localities Upper part Western area Eastern area -- --- -- -- - -- - -- -- -- -- -- --- -- -- --- --- --x X~- -- ---- - -- -- -- - - - - --- -- --I - - - -- -- - - -- X -- X6 - --- X> > 6 X1 49 Western area w000 6666 - - --- -- -- sp. -- - -- -- X - --- ---- --- --- - ---- -- -- - -.. , X X X X X ? x X X X X ?Sp. sp. x X X ? -