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dc.contributor.authorMartin, Helen M.
dc.date.accessioned2013-08-15T12:52:29Z
dc.date.available2013-08-15T12:52:29Z
dc.date.issued1957-04
dc.identifier.urihttp://hdl.handle.net/11045/24117
dc.descriptionPartial OCR done. 18 pages total.en_US
dc.description.abstractThe four counties bordering Grand Traverse Bay with Kalkaska and Benzie counties form a unit sharing the same geologic history. The foundation of the region is a segment of the western rim of the nest of rock bowls that are the bedrock of the Southern Peninsula. The Foundation Through millions of years Michigan was a-building. After the iron formations and the copper bearing lavas were piled on the northern rim of the granitic bowl we call the Michigan Basin, after earth movements had lifted, compressed, folded, metamorphosed or changed, the sediments of the Huronian iron-forming age and had broken and uplifted the copper bearing lava flows of Keweenawan time, then came a time of quiet and of early life known as the Paleozoic, (primitive plants, algae, fungi, bacteria were in existence during the Huronian). During the Paleozoic, six major ocean-encroachments were made over North America, seas entered and retreated from the Michigan Basin. Each major sea ebbed and flowed several times covering the basin in whole or in part. Each time of major encroachment has a name: Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian. Likewise the sediments of each minor sea has been given a name. At least 5^en_US
dc.description.sponsorshipMaterials from the collection of Thomas M. Kelly, Fisheries Biologist and founder of Inland Seas Education Association.en_US
dc.language.isoen_USen_US
dc.publisherMichigan Department of Conservationen_US
dc.subjectGrand Traverse Bayen_US
dc.subjectKalkaska Countyen_US
dc.subjectBenzie Countyen_US
dc.subjectAntrim Countyen_US
dc.subjectEllsworthen_US
dc.subjectCup coralen_US
dc.subjecthorn coralen_US
dc.subjectbrachiopoden_US
dc.subjectwinged shellen_US
dc.subjectpetoskey stoneen_US
dc.subjectAtrypaen_US
dc.subjectFossilsen_US
dc.subjectCharlevoixen_US
dc.subjectManisteeen_US
dc.subjectHayes Townshipen_US
dc.titleOutline of the Geologic History of the Grand Traverse Regionen_US
dc.typeTechnical Reporten_US


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