FORMATION CODES USED IN THE ON-LINE DATABASE AONE A-1 CTRC CATARACT AONE1 A-1 ANHYDRITE CNCN CINCINNATIAN AONE2 A-1 CARBONATE CLNN CLINTON AONE3 A-1 DOLOMITE CLCC CLINTON-CATARACT AONE4 A-1 EVAPORITE CLDR3 COLDWATER SHALE AONE5 A-1 SALT CLDR1 COLDWATER LIMESTONE ATWO A-2 CLDR2 COLDWATER RED ROCK ATWO1 A-2 ANHYDRITE CRDL CORDELL ATWO2 A-2 CARBONATE DRRV DETROIT RIVER ATWO3 A-2 DOLOMITE DRRV1 DETROIT RIVER ANHY ATWO4 A-2 EVAPORITE DRRV2 DETROIT RIVER DOLOMITE ATWO5 A-2 LIMESTONE DRRV6 DETROIT RIVER EVAP ATWO6 A-2 SALT DRRV3 DETROIT RIVER GROUP ALPN ALPENA DRRV4 DETROIT RIVER SALT ALPN1 ALPENA LIMESTONE DRRV5 DETROIT RIVER SZ AMBG AMHERSTBURG DORR DORR ZONE ADRD ANDERDON DRBC DRESBACH ANRM ANTRIM DUND DUNDEE ANRM1 ANTRIM DARK ECLR EAU CLAIRE ANRM2 ANTRIM LIGHT ELSR ELLSWORTH BILD BASS ISLANDS ELSR1 ELLSWORTH SHALE BPRT BAYPORT LIMESTONE FILR FILER SANDSTONE BDFD BEDFORD SHALE FRNC FRANCONIA BELL1 BELL SHALE GLVL GALESVILLE BERE BEREA SANDSTONE GDID GARDEN ISLAND BRBD BEREA-BEDFORD GCDF GLACIAL DRIFT BIG BIG ANHYDRITE GLND GLENWOOD BKRV BLACK RIVER GDRV GRAND RIVER BKRV1 BLACK RIVER SHALE GRWS GRANITE WASH BBLC BOIS BLANC GLPH GUELPH BRWN BROWN LIMESTONE HKFB HENDRICKS-FIBORN BBLF BURNT BLUFF JBVL JACOBSVILLE BYRN BYRON JRSC JURASSIC CBHD CABOT HEAD LAC LACHINE CMBR CAMBRIAN LMID LIME ISLAND FORMATION CODES USED IN THE ON-LINE DATABASE LCKP LOCKPORT RDCT REED CITY LUCS LUCAS RDCT1 REED CITY ANHYDRITE MNSQ MANISTIQUE RDCT2 REED CITY DOLOMITE MNLN MANITOULIN RCFD RICHFIELD MRSL MARSHALL RGRC ROGERS CITY MRSLL MARSHALL LOWER SGNW SAGINAW MRSL1 MARSHALL SANDSTONE SLIN SALINA MRSLU MARSHALL UPPER SLIN1 SALINA B MSSV MASSIVE ANHYDRITE SLIN2 SALINA B ANHYDRITE MSSV1 MASSIVE SALT SLIN3 SALINA B SALT MCGN MICHIGAN FORMATION SLIN4 SALINA C SHALE MCGN1 MICHIGAN STRAY SLIN5 SALINA D SALT MCGN2 MICHIGAN STRAY SANDSTONE SLIN6 SALINA E MSSP MISSISSIPPIAN SLIN7 SALINA F MONRM MONROE MIDDLE SLIN8 SALINA F SALT MNSM MOUNT SIMON SLIN9 SALINA G MNSG MUNISING SHKP SHAKOPEE NRCM NEW RICHMOND SLRN SILURIAN NGRN NIAGARAN SQBY SQUAW BAY NGRN1 NIAGARAN BROWN STPR ST PETER NGRN2 NIAGARAN GRAY SRSR STRAY-STRAY SANDSTONE NGRN3 NIAGARAN WHITE SNBR1 SUNBURY SHALE NOR NORWOOD SLVN SYLVANIA ONOT ONEOTA SLVN1 SYLVANIA SANDSTONE PARM PARMA SANDSTONE TRVR TRAVERSE PAX PAXTON TRVR1 TRAVERSE CHERT PSLV PENNSYLVANIAN TRVR2 TRAVERSE FORMATION PSALT POTASSIUM SALT TRVR3 TRAVERSE GROUP PRFM POTTER FARM TRVR4 TRAVERSE LIMESTONE PRDC PRAIRIE DU CHIEN TMPL TREMPEALEAU PCMB PRECAMBRIAN TRNN TRENTON PCMB3 PRECAMBRIAN GRANITE TBRV TRENTON-BLACK RIVER RDBD RED BEDS TRPL TRIPLE GYPSUM RRCK REDROCK UTIC UTICA .