BEDROCK GEOLOGY OF MICHIGAN BEDROCK GEOLOGY OF THE EASTERN UPPER PENNINSULA MAC MACKINAC BRECCIA BBF BOIS BLANC FORMATION GIF PLV GARDEN ISLAND FORMATION BIG BASS ISLAND GROUP CHC SAL SALINA GROUP KEWEENAW SID SAINT IGNACE DOLOMITE PAC POINT AUX CHENES SHALE ENG ENGADINE GROUP MQG MANISTIQUE GROUP CHC BBG BURNT BLUFF GROUP PLV CHS CABOT HEAD SHALE MND MANITOULIN DOLOMITE QUS QUEENSTON SHALE NSF HOUGHTON BHD BIG HILL DOLOMITE STF STONINGTON FORMATION CHC FSS USM UTICA SHALE MEMBER AGR BBF CSM COLLINGWOOD SHALE MEMBER NSF CHC JAC NSF ONTONAGON TRN OBF TRENTON GROUP BARAGA AVS JAC FSS AGR GOGEBIC MUN BRG BLACK RIVER GROUP MGF TMP SCF EVC PDC MGF PRAIRIE DU CHIEN GROUP IIF PDC SAQ CHO NIF LUCE BRG PAF NIF AGR SCF CSM TRN JAC TMP TREMPEALEAU FORMATION MGF GDQ JAC USM AMF AVS MARQUETTE MUN MCG BRG MUNISING FORMATION AGR NIF AGR BIF ALGER STF CHIPPEWA AGR BHD HEM QUS AGR MGF MND CHS AGR IRON INT SCHOOLCRAFT BHD MCG BBG BDG DCF DICKINSON BBG AVS ENG QUS PRG RAD MND RAD MACKINAC AVS BBG CHS QUF MQG MQG CG BEDROCK GEOLOGY OF THE RIF M TMP DELTA PAC ENG WESTERN UPPER PENNINSULA BDG CHO MAC AGR SID MAC MACKINAC BRECCIA SAL ENG GIF MGF BBF JAC JACOBSVILLE SANDSTONE INT BBG BBF FSS FREDA SANDSTONE DRG BBF DRG NSF NONESUCH FORMATION QUF MQG BLS MENOMINEE BBG ENG EMMET CHC COPPER HARBOR CONGLOMERATE MUN TRG DDL OBF OAK BLUFF FORMATION PRESQUE PLV PORTAGE LAKE VOLCANICS CHEBOYGAN ISLE ANT SCF SIEMENS CREEK FORMATION CHARLEVOIXCWT ANT BER INT INTRUSIVE QUF QUINNESEC FORMATION BER BED ELL PRG PAINT RIVER GROUP ALPENA ANTRIM OTSEGO MONTMORENCY RIF RIVERTON IRON FORMATION TRG S LEELANAU CWT UN BIF BIJIKI IRON FORMATION ANT NIF NEGAUNEE IRON FORMATION IIF IRONWOOD IRON FORMATION BEDROCK GEOLOGY OF THE GRAND ALCONA LOWER PENNINSULA KALKASKA CRAWFORD OSCODA DCF DUNN CREEK FORMATION BENZIE TRAVERSE ELL RDB RED BEDS MIF BDG BADWATER GREENSTONE CWT GRF MGF MICHIGAMME FORMATION GRAND RIVER FORMATION GDQ GOODRICH QUARTZITE SAG SAGINAW FORMATION MISSAUKEE IOSCO WEXFORD OGEMAWCWT BAY BAYPORT LIMESTONE MANISTEE MIF AMF AMASA FORMATION ROSCOMMON HEM HEMLOCK FORMATION MIF MICHIGAN FORMATION BAY MCG MENOMINEE & CHOCOLAY GROUPS MAR MARSHALL FORMATION ARENAC EVC EMPEROR VOLCANIC COMPLEX CWT COLDWATER SHALE GLADWIN MASON LAKE OSCEOLA CLARE SAQ SIAMO SLATE & AJIBIK QUARTZITE SUN SUNBURY SHALE BAY HURON PAF PALMS FORMATION BER BEREA SANDSTONE & BEDFORD SAG SUN CHO CHOCOLAY GROUP BED BEDFORD SHALE BAY RAD RANDVILLE DOLOMITE ELL ELLSWORTH SHALE MECOSTA SAG MIDLAND CWT AUM ARCHEAN ULTRAMAFIC OCEANA RBD ISABELLA Y ANT ANTRIM SHALE A B AGR ARCHEAN GRANITE & GNEISSIC NEWAYGO SAG TRG TRAVERSE GROUP MIF AVS ARCHEAN VOLCANIC & SEDIMENTARY SANILAC BLS BELL SHALE TUSCOLA SAGINAW MAR DDL DUNDEE LIMESTONE MONTCALM MUSKEGON GRATIOT TRG DRG DETROIT RIVER GROUP ANT SSS SYLVANIA SANDSTONE BAY LAPEER ST. MAC MACKINAC BRECCIA BED GENESEE CLAIR BBF BOIS BLANC FORMATION MAR OTTAWA KENT IONIA CLINTON SHIAWASSEE GIF GARDEN ISLAND FORMATION GRF MACOMB R BIG BASS ISLAND GROUP BE SAL SALINA GROUP OAKLAND LIVINGSTON BARRY EATON INGHAM SUN BED ALLEGAN MIF ANT BAY TRG DDL VAN WASHTENAW BUREN KALAMAZOO CALHOUN JACKSON CWT WAYNE DRG GIF TRG ELL SSS ANT ST. BIG CASS BRANCH LENAWEE MONROE I BERRIEN JOSEPH HILLSDALE SAL SOURCE Bedrock Geology of Michigan 1987, 1:500,000 scale, which was compiled from a variety of sources by the Michigan Department of Environmental Quality, Office of the Geological Survey. Geo_Data Services, Michigan Center for 015 30 60 90 120 Geographic Information, Department of Information Technology DATE: 10/01/2005 Miles.