| dbo:abstract |
The Challis Arc was an Eocene volcanic field that stretched from southwestern British Columbia through Washington to Idaho, United States. The volcanic field extended between 42 and 49 degrees north latitude and was about 1500 kilometers in length. It exhibited volcanic activity for about 10 million years. Remnants of the Challis Arc are found as granitic plutons in the North Cascades, the Okanagan Highlands and in southcentral Idaho. It was first theorized in 1979 that the volcanic field formed as a result of subduction of the eastern block of the Kula Plate between 57 and 37 million years ago. More recent publications argue that the Challis Arc was formed by more complex tectonic interactions. One proposed model theorizes that the Farallon plate underwent subduction and imbrication beneath the North American plate to form the Challis Arc. Another model suggests that intracontinental rifting and igneous activity between the Pacific and North American plates formed the Challis arc. By definition, a volcanic arc is formed via subduction, so the Challis Arc's naming as a volcanic arc is a matter of debate among geologists. The current limited availability of historical geochemical data prevents any of the proposed theories from being confirmed or falsified, so there is still no consensus on the Challis Arc's formation. (en) |
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dbr:United_States dbr:Eocene dbc:Geology_of_Washington_(state) dbc:Geology_of_British_Columbia dbc:Geology_of_Idaho dbr:Kula_Plate dbr:Volcanic_arc dbr:British_Columbia dbr:Washington_(U.S._state) dbr:North_American_Plate dbr:North_Cascades dbr:Pacific_Plate dbr:Farallon_Plate dbr:Granite dbr:Tectonics dbr:Subduction dbr:Challis,_Idaho dbc:Volcanic_arcs dbr:Volcanic_field dbr:Okanagan_Highland dbr:File:North_Cascades.jpg |
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dbt:Reflist dbt:Canada-geology-stub dbt:Volcanology-stub dbt:US-geology-stub |
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dbc:Geology_of_Washington_(state) dbc:Geology_of_British_Columbia dbc:Geology_of_Idaho dbc:Volcanic_arcs |
| gold:hypernym |
dbr:Field |
| rdf:type |
yago:WikicatVolcanicArcs yago:Conduction111512818 yago:Discharge111511523 yago:ElectricalConduction111512650 yago:NaturalPhenomenon111408559 yago:Phenomenon100034213 yago:PhysicalEntity100001930 yago:PhysicalPhenomenon111419404 yago:Process100029677 |
| rdfs:comment |
The Challis Arc was an Eocene volcanic field that stretched from southwestern British Columbia through Washington to Idaho, United States. The volcanic field extended between 42 and 49 degrees north latitude and was about 1500 kilometers in length. It exhibited volcanic activity for about 10 million years. Remnants of the Challis Arc are found as granitic plutons in the North Cascades, the Okanagan Highlands and in southcentral Idaho. (en) |
| rdfs:label |
Challis Arc (en) |
| owl:sameAs |
freebase:Challis Arc yago-res:Challis Arc wikidata:Challis Arc https://global.dbpedia.org/id/4h6Zf |
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wikipedia-en:Challis_Arc?oldid=994677105&ns=0 |
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wiki-commons:Special:FilePath/North_Cascades.jpg |
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wikipedia-en:Challis_Arc |
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dbr:Challis_Volcanic_Arc |
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dbr:Geology_of_the_Pacific_Northwest dbr:Siletzia dbr:Challis_Volcanic_Arc |
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wikipedia-en:Challis_Arc |
