1987 Bedrock Geology of Michigan

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1987 BEDROCK GEOLOGY OF MICHIGAN BEDROCK GEOLOGY OF EASTERN UPPER PENINSULA MACKINAC BRECCIA BOIS BLANC FORMATION GARDEN ISLAND FORMATION BASS ISLAND GROUP SALINA GROUP SAINT IGNACE DOLOMITE POINT AUX CHENES SHALE ENGADINE GROUP MANISTIQUE GROUP BURNT BLUFF GROUP KEWEENAW CABOT HEAD SHALE MANITOULIN DOLOMITE QUEENSTON SHALE BIG HILL DOLOMITE HOUGHTON STONINGTON FORMATION UTICA SHALE MEMBER COLLINGWOOD SHALE MEMBER TRENTON GROUP BLACK RIVER GROUP ONTONAGON BARAGA PRAIRIE DU CHIEN GROUP TREMPEALEAU FORMATION MUNISING FORMATION GOGEBIC LU CE MARQUETTE ALGER CHIPPEWA IRON MACKINAC SCHOOLC RAF T DELT A DICKIN SON BEDROCK GEOLOGY OF WESTERN UPPER PENINSULA MACKINAC BRECCIA JACOBSVILLE SANDSTONE EMMET MENOMINEE FREDA SANDSTONE CHEBOYGAN NONESUCH FORMATION PRESQUE ISLE COPPER HARBOR CONGLOMERATE OAK BLUFF FORMATION CHAR LEVOIX PORTAGE LAKE VOLCANICS MONTMORENCY SIEMENS CREEK FORMATION ANT RIM ALPENA INTRUSIVE OTSEGO QUINNESEC FORMATION LEELANAU PAINT RIVER GROUP RIVERTON IRON FORMATION BIJIKI IRON FORMATION GRAND TR AVERSE ALCONA KALKASKA CRAW FOR D OSCOD A NEGAUNEE IRON FORMATION BENZIE IRONWOOD IRON FORMATION DUNN CREEK FORMATION BADWATER GREENSTONE MICHIGAMME FORMATION MANISTEE WEXFORD MISSAUKEE ROSCOMMON OGEMAW IOSCO GOODRICH QUARTZITE HEMLOCK FORMATION BEDROCK GEOLOGY OF ARENAC MENOMINEE & CHOCOLAY GROUPS LOWER PENINSULA EMPEROR VULCANIC COMPLEX MASON LAKE OSCEOLA CLARE GLADWIN SIAMO SLATE & AJIBIK QUARTZITE RED BEDS HURON PALMS FORMATION GRAND RIVER FORMATION CHOCOLAY GROUP SAGINAW FORMATION BAY RANDVILLE DOLOMITE BAYPORT LIMESTONE MICHIGAN FORMATION ARCHEAN ULTRAMAFIC OCEANA MECOST A ISABELLA MIDLAND MARSHALL FORMATION ARCHEAN GRANITE & GNEISSIC NEWAYGO ARCHEAN VOL. & SEDIMENTARY COLDWATER SHALE TUSCOLA SANILAC SUNBURY SHALE BEREA SS & BEDFORD SH SAGIN AW MUSKEGON MONTCALM GRATIOT BEDFORD SHALE ELLSWORTH SHALE LAPEER ST CLAIR ANTRIM SHALE SHIAWASSEE TRAVERSE GROUP KENT GENESEE OTT AW A BELL SHALE IONIA CLINTON DUNDEE LIMESTONE MACOMB DETROIT RIVER GROUP SYLVANIA SANDSTONE OAKLAND MACKINAC BRECCIA INGHAM LIVINGSTON ALLEGAN BARRY EATON BOIS BLANC FORMATION GARDEN ISLAND FORMATION BASS ISLAND GROUP WAYNE SALINA GROUP WASHT ENAW VAN BUREN KALAMAZOO CALHOUN JACKSON SOURCE BERRIEN MONROE CASS ST JOSEPH BRANCH HILLSDALE LENAWEE M ICHI GAN DEPARTM ENT O F NATURAL RESOU RCES Michi gan LAND AND MI NERALS SERVICES DIVISION RESOURCE M APPI NG AND AERI AL PHO TOG RAPHY RMAP Michigan Resource Inf orm ation System Part 609, Resource Inventory, of the Nat ural Resources and Environmental Prot ect ion Act, 1994 PA 451, as amended. Autom ated from "Bedrock Geology of Mi chi gan, " 1987, 1:500, 000 scal e, which was com piled f rom a vari ety of sources by t he M ichi gan Depart ment of Environmental Qualit y, Geological Survey Division. 0 20 40 Miles Date: 11/12/99 N.

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1987 BEDROCK GEOLOGY OF MICHIGAN BEDROCK GEOLOGY OF EASTERN UPPER PENINSULA MACKINAC BRECCIA BOIS BLANC FORMATION GARDEN ISLAND FORMATION BASS ISLAND GROUP SALINA GROUP SAINT IGNACE DOLOMITE POINT AUX CHENES SHALE ENGADINE GROUP MANISTIQUE GROUP BURNT BLUFF GROUP KEWEENAW CABOT HEAD SHALE MANITOULIN DOLOMITE QUEENSTON SHALE BIG HILL DOLOMITE HOUGHTON STONINGTON FORMATION UTICA SHALE MEMBER COLLINGWOOD SHALE MEMBER TRENTON GROUP BLACK RIVER GROUP ONTONAGON BARAGA PRAIRIE DU CHIEN GROUP TREMPEALEAU FORMATION MUNISING FORMATION GOGEBIC LU CE MARQUETTE ALGER CHIPPEWA IRON MACKINAC SCHOOLC RAF T DELT A DICKIN SON BEDROCK GEOLOGY OF WESTERN UPPER PENINSULA MACKINAC BRECCIA JACOBSVILLE SANDSTONE EMMET MENOMINEE FREDA SANDSTONE CHEBOYGAN NONESUCH FORMATION PRESQUE ISLE COPPER HARBOR CONGLOMERATE OAK BLUFF FORMATION CHAR LEVOIX PORTAGE LAKE VOLCANICS MONTMORENCY SIEMENS CREEK FORMATION ANT RIM ALPENA INTRUSIVE OTSEGO QUINNESEC FORMATION LEELANAU PAINT RIVER GROUP RIVERTON IRON FORMATION BIJIKI IRON FORMATION GRAND TR AVERSE ALCONA KALKASKA CRAW FOR D OSCOD A NEGAUNEE IRON FORMATION BENZIE IRONWOOD IRON FORMATION DUNN CREEK FORMATION BADWATER GREENSTONE MICHIGAMME FORMATION MANISTEE WEXFORD MISSAUKEE ROSCOMMON OGEMAW IOSCO GOODRICH QUARTZITE HEMLOCK FORMATION BEDROCK GEOLOGY OF ARENAC MENOMINEE & CHOCOLAY GROUPS LOWER PENINSULA EMPEROR VULCANIC COMPLEX MASON LAKE OSCEOLA CLARE GLADWIN SIAMO SLATE & AJIBIK QUARTZITE RED BEDS HURON PALMS FORMATION GRAND RIVER FORMATION CHOCOLAY GROUP SAGINAW FORMATION BAY RANDVILLE DOLOMITE BAYPORT LIMESTONE MICHIGAN
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Contents Illustrations Table Introduction
The Base of the Upper Keweenawan, ILLUSTRATIONS Michigan and Wisconsin FIGURE 1. Distribution of the Copper Harbor Conglomerate and included mafic lava members...........................................2 By WALTER S. WHITE 2. Stratigraphic section of the Copper Harbor Conglomerate..2 CONTRIBUTIONS TO STRATIGRAPHY 3. Longitudinal stratigraphic section of Keweenawan rocks below the base of the Nonesuch Shale............................3 4. Mean directions of magnetization for some Keweenawan GEOLOGICAL SURVEY BULLETIN 1354-F rocks.. ..............................................................................6 A proposal to adopt the top of the Copper Harbor 5. Proposed nomenclature for middle and upper Keweenawan Conglomerate as the base of the upper Keweenawan in rocks ................................................................................9 the Lake Superior region TABLE TABLE 1. Compressional wave velocities (km/sec) for selected Keweenawan stratigraphic units, Lake Superior region ...7 ABSTRACT UNITED STATES GOVERNMENT PRINTING OFFICE, The top of the Copper Harbor Conglomerate (base of WASHINGTON : 1972 Nonesuch Shale) is a more satisfactory boundary between upper and middle Keweenawan rocks in northern Michigan and UNITED STATES DEPARTMENT OF THE INTERIOR adjacent parts of Wisconsin than the various horizons that ROGERS G. B. MORTON, Secretary have been used hitherto without stratigraphic consistency from GEOLOGICAL SURVEY place to place. Irving’s original boundary (1883) cannot be V. E. McKelvey, Director followed away from the Keweenaw Peninsula. The top of the Copper Harbor Conglomerate comes closer to marking the Library of Congress catalog-card No. 72-75175 close of Keweenawan volcanism than other major boundaries and actually adheres more closely to Irving’s original concept For sale by the Superintendent of Documents, U.S. Government Printing Office than the boundary that he himself chose.
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