The Bigfork Chert is a Middle to Late Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. First described in 1892, this unit was not named until 1909 by Albert Homer Purdue in his study of the Ouachita Mountains of Arkansas. Purdue assigned the town of Big Fork in Montgomery County, Arkansas as the type locality, but did not designate a stratotype. As of 2017, a reference section for this unit has yet to be designated. The Bigfork Chert is known to produce , turquoise, variscite, and wavellite minerals.
| Property |
Value |
| dbo:abstract |
The Bigfork Chert is a Middle to Late Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. First described in 1892, this unit was not named until 1909 by Albert Homer Purdue in his study of the Ouachita Mountains of Arkansas. Purdue assigned the town of Big Fork in Montgomery County, Arkansas as the type locality, but did not designate a stratotype. As of 2017, a reference section for this unit has yet to be designated. The Bigfork Chert is known to produce , turquoise, variscite, and wavellite minerals. (en) |
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dbr:List_of_fossiliferous_stratigraphic_units_in_Arkansas dbr:Big_Fork,_Arkansas dbr:United_States dbc:Katian dbr:Chert dbr:Montgomery_County,_Arkansas dbr:Climacograptus dbr:Turquoise dbr:Ouachita_Mountains dbr:Diplograptus dbr:Graptolithina dbr:Formation_(geology) dbr:Arkansas dbc:Ordovician_southern_paleotropical_deposits dbc:Ordovician_Arkansas dbc:Ordovician_geology_of_Oklahoma dbr:Oklahoma dbr:Ordovician dbr:Type_locality_(geology) dbr:Formation_(stratigraphy) dbr:Variscite dbr:Wavellite dbr:Polk_Creek_Shale dbr:Paleontology_in_Arkansas dbr:Womble_Shale dbr:Stratotype dbr:Orthograptus dbr:Glyptograptus dbr:Planerite dbr:Dicellograptus dbr:Lasiograptus dbr:Mesograptus |
| dbp:age |
dbr:Ordovician |
| dbp:country |
dbr:United_States |
| dbp:name |
Bigfork Chert (en) |
| dbp:namedby |
Albert Homer Purdue (en) |
| dbp:namedfor |
Big Fork, Montgomery County, Arkansas (en) |
| dbp:overlies |
dbr:Womble_Shale |
| dbp:prilithology |
dbr:Chert |
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dbr:Arkansas dbr:Oklahoma |
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none (en) |
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450 (xsd:integer) |
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dbr:Formation_(stratigraphy) |
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dbr:Polk_Creek_Shale |
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none (en) |
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dbt:Infobox_rockunit dbt:Portal dbt:Reflist dbt:US-geologic-formation-stub |
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dbc:Katian dbc:Ordovician_southern_paleotropical_deposits dbc:Ordovician_Arkansas dbc:Ordovician_geology_of_Oklahoma |
| rdfs:comment |
The Bigfork Chert is a Middle to Late Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. First described in 1892, this unit was not named until 1909 by Albert Homer Purdue in his study of the Ouachita Mountains of Arkansas. Purdue assigned the town of Big Fork in Montgomery County, Arkansas as the type locality, but did not designate a stratotype. As of 2017, a reference section for this unit has yet to be designated. The Bigfork Chert is known to produce , turquoise, variscite, and wavellite minerals. (en) |
| rdfs:label |
Bigfork Chert (en) |
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wikidata:Bigfork Chert https://global.dbpedia.org/id/4Xdc6 |
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wikipedia-en:Bigfork_Chert?oldid=1006848086&ns=0 |
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wikipedia-en:Bigfork_Chert |
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dbr:Ouachita_Mountains dbr:Katian dbr:Polk_Creek_Shale dbr:Womble_Shale |
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dbr:Polk_Creek_Shale |
| is dbp:underlies of |
dbr:Womble_Shale |
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wikipedia-en:Bigfork_Chert |