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Unkar Group

The Unkar Group is a sequence of strata of Proterozoic age that are subdivided into five geologic formations and exposed within the Grand Canyon, Arizona, Southwestern United States. The Unkar Group is the basal formation of the Grand Canyon Supergroup. The Unkar is about 1,600 to 2,200 m (5,200 to 7,200 ft) thick and composed, in ascending order, of the…

Measurement, Formations of the Unkar Group & Overview

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Area
Arizona, east Grand Canyon, Lava Butte region, on Colorado River, near Lipan Point
Country
Southwestern United States
Named by
Walcott (1894) and Noble (1910, 1914)
Named for
Unkar Valley
Other
dolomite and limestone
Overlies
Vishnu Basement Rocks

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Overview

Nomenclature

Formations of the Unkar Group

Unconformities

Age

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Map overview Semantic statistics

Unkar Group

Nodes73
Edges72
Triples165
Avg. degree1.97
Density0.027397
Components1

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Unkar Group

Top relations

related to External links · 76
Unkar Group → American Association, Angular, Anonymous, Archived, Arizona, Bloch, Bob's Rock Shop, Bowman, Brandriss, Cambrian, Casper, Chuar Group, Colorado Plateau, Colorado Plateau Archived, Crossey, Dehler, Delineation, Detrital Zircon Geochronology, Disassembly, Discovery Article
related to Unconformities · 29
Unkar Group → Bass Formation, Bright Angel, Bright Angel Shale, Cardenas Basalt, Grand Canyon Supergroup, Granite Narrows, Great Unconformity, However, In Hotauta Canyon, Isis Temple, Lava Butte, Proterozoic, Shinuino, Shinumo Creek, Shinumo Quartzite, Tapeats Sandstone, Tapeats Sea, The, The Hotauta Member, The Vishnu Basement Rocks
related to Nomenclature · 26
Unkar Group → Algonkian, Although, Bass Limestone, Cardenas Basalt, Cardenesan Series, Charles, Chuar, Dox Formation, Dox Sandstone, Grand Canyon, Hakatai Shale, He, Hotauta Conglomerate, In, It, Keyes, Levi, Nankoweap Formation, Noble, Proterozoic
related to Age · 16
Unkar Group → As, Bass Formation, Colorado River, Earth's, However, List, Ma, Mile, Prior, Radiometric, The, Then, These, Thus, U-Pb, Vishnu Basement Rocks
is a · 4
Unkar Group → basal formation of the Grand Canyon Supergroup, major unconformity that also forms the base of the Grand Canyon Supergroup, prominent angular unconformity, sequence of strata of Proterozoic age that are subdivided into five geologic formations and exposed within the Grand Canyon
Area · 1
Unkar Group → Arizona, east Grand Canyon, Lava Butte region, on Colorado River, near Lipan Point
Country · 1
Unkar Group → Southwestern United States
Named by · 1
Unkar Group → Walcott (1894) and Noble (1910, 1914)
Named for · 1
Unkar Group → Unkar Valley
Other · 1
Unkar Group → dolomite and limestone

Important terminology Word statistics

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Important terminology

group unkar canyon grand formation basalt cardenas strata quartzite shinumo rocks supergroup shale bass hakatai dox basement sandstone unconformity part

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Unkar GroupAreaArizona, east Grand Canyon, Lava Butte region, on Colorado River, near Lipan Point1.00infobox
Unkar GroupCountrySouthwestern United States1.00infobox
Unkar GroupNamed byWalcott (1894) and Noble (1910, 1914)1.00infobox
Unkar GroupNamed forUnkar Valley1.00infobox
Unkar GroupOtherdolomite and limestone1.00infobox
Unkar GroupOverliesVishnu Basement Rocks1.00infobox
Unkar GroupPrimarysandstone, siltstone, shale, and basaltic volcanic rocks1.00infobox
Unkar GroupRegionArizona northcentral AZ into southcentral Utah in the subsurface1.00infobox
Unkar GroupSub-unitsCardenas Basalt Dox Formation Shinumo Quartzite volcanic dikes as source for Cardenas Basalt Hakatai Shale Bass Formation1.00infobox
Unkar GroupThickness1,600 to 2,200 meters (5,200 to 7,200 ft)1.00infobox
Unkar GroupTypeGeologic group1.00infobox
Unkar GroupUnderliesNankoweap Formation and, as part of the Great Unconformity, the Tapeats Sandstone1.00infobox
Unkar GroupUnit ofGrand Canyon Supergroup1.00infobox
Unkar Groupis asequence of strata of Proterozoic age that are subdivided into five geologic formations and exposed within the Grand Canyon0.90text
Unkar Groupis abasal formation of the Grand Canyon Supergroup0.90text
Unkar Groupis amajor unconformity that also forms the base of the Grand Canyon Supergroup0.90text
Unkar Groupis aprominent angular unconformity0.90text

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