| 词条 | Munising Formation |
| 释义 |
| name = Munising Formation | image = Pictured Rocks National Lakeshore sandstone.JPG | caption = Light-colored Musining Formation overlying the red Jacobsville Formation in Pictured Rocks National Lakeshore | type = Formation | age = Cambrian-?Early Ordovician | period = Cambrian | prilithology = Conglomerate | otherlithology = Anhydrite | namedfor = | namedby = | region = {{Flag|Michigan}} {{flag|Ontario}} | country = {{USA}} {{CAN}} | coordinates = | unitof = | subunits = Miner's Castle Member, Chapel Rock Member, and Basal Conglomerate | underlies = Au Train Formation | overlies = Jacobsville Sandstone | thickness = {{convert|1700|ft|m|abbr=on}} | extent = | area = | map = | map_caption = }} The Munising Group or Formation is a {{convert|1700|ft|m}} thick, white to light grey[1] Cambrian sedimentary unit that crops out in Michigan and (to a lesser extent) Ontario. At one end of its extent, it comprises a basal conglomerate overlain by the Chapel Rock Member and the Miners Castle Member; elsewhere, it comprises the Eau Claire, Galesville (=Dresbach), and Franconia Members. Anhydritic evaporite deposits are present in places.[1] The conglomerate was deposited by rivers in flood, with the Chapel Rock member, which contains deltaic deposits, representing transgression as the conglomerate cones became submerged; the Miners Castle member was deposited further from the shoreline, representing shelf deposits.[2] Its uppermost strata may be Early Ordovician in age, and contain conodonts, trilobites and phosphatic moulds of brachiopods, ostrocoderm fish and gastropods.[3] The Munising lies unconformably above the Jacobsville Formation.[4] References1. ^{{Cite journal| volume=57| year=1973| issue=12| title= Cambrian Lithostratigraphy of Michigan Basin| author=Paul A. Catacosinos| journal=The American Association of Petroleum Geologists Bulletin |pages=2404–2418| doi=10.1306/83d9132b-16c7-11d7-8645000102c1865d}} {{Stratigraphic column of Michigan}}2. ^{{Cite journal | last1 = Charles a. Haddox | first1 = R. H. D. | title = Cambrian Shoreline Deposits in Northern Michigan | journal = SEPM Journal of Sedimentary Research | year = 1990 | doi = 10.1306/212F9250-2B24-11D7-8648000102C1865D}} 3. ^{{Cite journal | last1 = Miller | first1 = J. F. | last2 = Ethington | first2 = R. L. | last3 = Rose | first3 = R. | title = Stratigraphic Implications of Lower Ordovician Conodonts from the Munising and Au Train Formations at Pictured Rocks National Lakeshore, Upper Peninsula of Michigan | journal = PALAIOS | volume = 21 | issue = 3 | pages = 227–237 | year = 2006 | doi = 10.2110/palo.2004.p04-50}} 4. ^1 {{cite web|title=Pictured Rocks: Geologic Formations|url=http://www.nps.gov/piro/naturescience/geologicformations.htm|publisher=US National Park Service|accessdate=August 5, 2011}} 11 : Geologic formations of Michigan|Geologic formations of Ontario|Cambrian System of North America|Cambrian Michigan|Cambrian Canada|Conglomerate formations|Fluvial deposits|Deltaic deposits|Evaporite deposits|Fossiliferous stratigraphic units of North America|Paleontology in Michigan |
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