USGS Visual Identifier

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Geologic Unit: Huckleberry Ridge

Publication:
Christiansen, R.L., and Blank, H.R., Jr., 1972, Volcanic 
   stratigraphy of the Quaternary rhyolite plateau in Yellowstone 
   National Park, IN Geology of Yellowstone National Park: U.S. 
   Geological Survey Professional Paper, 729-B, p. B1-B18. 
   [Available online from the USGS PubsWarehouse:  http://
   pubs.er.usgs.gov/pubs/pp/pp729B]
Usage in Publication:
Huckleberry Ridge Tuff*

Modifications: Geologic Province: Dominant Lithology:
 Named
 Isotopic dating
 Yellowstone province
 Tuff

Summary:
Named as the oldest ash-flow sheet of Yellowstone Group (raised in rank from formation) for the topographic crest of Huckleberry Ridge east of the Snake River, south of Yellowstone National park and north of Jackson Lake, Teton Co, WY in the Yellowstone province. Type section designated as cliff exposure at head of large landslide 1.8 km N 10 deg E of Snake River bridge at Flagg Ranch, 3 mi south of South Entrance of Park. Is a 170 m thick welded phenocryst-rich rhyolite ash-flow tuff at type forming a single compound cooling unit. Is exposed around margins of Yellowstone Park and south to Jackson Hole, north down Gallatin River Valley as far as West Fork, and west into Island Park area to edge of younger lavas of Snake River Plain, ID. Locally is as much as 300 m thick. Overlies Cretaceous sandstone and shale; underlies Mesa Falls Tuff (new) in other areas. Divided into three informal members based on changes in welding and minor variations in phenocryst content. Is considered a middle unit of the first (of three) volcanic cycles of the Quaternary Yellowstone Plateau. K-Ar dating of sanidine indicates an age of 2 m.y.
Source: GNU records (USGS DDS-6; Denver GNULEX).


Publication:
Naeser, C.W., Izett, G.A., and Wilcox, R.E., 1973, Zircon 
   fission-track ages of Pearlette family ash beds in Meade 
   County, Kansas: Geological Society of America, Geology, v. 
   1, no. 2, p. 93-95.
Usage in Publication:
Huckleberry Ridge Tuff*

Modifications: Geologic Province: Dominant Lithology:
 Overview
 Yellowstone province
 

Summary:
Recent petrographic and chemical studies of ash samples called Pearlette have shown that there are at least three different ash beds on the Great Plains and Rocky Mountain area of closely related petrographic and properties that are related to the Yellowstone Tuff. Pearlette type O identified at Onion Creek, SE1/4 NE1/4 sec 26, T24S, R24E, Grand Co, UT, Paradox basin, has 0.7 +/-0.2 m.y. age, and at three localities in Meade Co, KS, Anadarko basin, has 0.6 +/-0.07 to 0.9 +/-0.25 m.y. age. Type O correlates with Lava Creek Tuff of Yellowstone area WY. Pearlette type S is correlated with the Mesa Falls Tuff of Yellowstone area of 1.2 m.y. age. Zircons from type S not dated because of small size and paucity. Pearlette type B identified at Cudahy ash Mine, Meade Co, KS in the Anadarko basin has an age of 2.0 m.y. and is correlated with Huckleberry Ridge Tuff of Yellowstone National Park, WY, Yellowstone province.
Source: GNU records (USGS DDS-6; Denver GNULEX).


Publication:
Pierce, K.L., 1974, Surficial geologic map of the Abiathar Peak 
   and parts of adjacent quadrangles, Yellowstone National Park, 
   Wyoming and Montana: U.S. Geological Survey Miscellaneous 
   Investigations Series Map, I-646, 1 sheet, scale 1:62,500
Usage in Publication:
Huckleberry Ridge Tuff*

Modifications: Geologic Province: Dominant Lithology:
 Areal limits
 Yellowstone province
 

Summary:
A tuff in the headwaters of the Lamar River previously assigned to the Huckleberry Ridge Tuff has been dated by zircons from the tuff and has chemical and petrographic characteristics that indicate it is not Huckleberry Ridge. Fission track ages range from 0.56 +/-0.24 to 1.1 +/-0.8 m.y. Tuff is probably Lava Creek Tuff.
Source: GNU records (USGS DDS-6; Denver GNULEX).


Publication:
Christiansen, R.L., and Love, J.D., 1978, The Pliocene Conant 
   Creek Tuff in the northern part of the Teton Range and Jackson 
   Hole, Wyoming, IN Contributions to stratigraphy: U.S. Geological 
   Survey Bulletin, 1435-C, p. C1-C9.
Usage in Publication:
Huckleberry Ridge Tuff*

Modifications: Geologic Province: Dominant Lithology:
 Revised
 Yellowstone province
 Snake River basin
 

Summary:
Overlies a newly named unit, the Pliocene Conant Creek Tuff, in the Teton Range, WY and nearby areas in northwestern WY in the Yellowstone province, and adjoining northeastern ID in the Snake River basin. Is assigned a Pleistocene age.
Source: GNU records (USGS DDS-6; Denver GNULEX).


Publication:
Love, J.D., and Christiansen, A.C., 1980, Chart showing rock 
   sequences and preliminary correlation of stratigraphic units 
   used on 10 x 20 geologic quadrangle maps of Wyoming: Wyoming 
   Geological Association Field Conference Guidebook, no. 32, 
   p. 279-282.
Usage in Publication:
Huckleberry Ridge Tuff*

Modifications: Geologic Province: Dominant Lithology:
 Age modified
 Yellowstone province
 Bighorn basin
 

Summary:
Using new decay constants, age recalculated to 2.02 +/-0.8 m.y. thereby changing age of Huckleberry Ridge Tuff of Yellowstone Group from Pleistocene to Pliocene. Occurs in Yellowstone area, Teton Range, in the Yellowstone province, and Absaroka, Washakie, and Gros Ventre Ranges, in the Bighorn basin.
Source: GNU records (USGS DDS-6; Denver GNULEX).


Publication:
Izett, G.A., and Wilcox, R.E., 1982, Map showing localities and 
   inferred distributions of the Huckleberry Ridge, Mesa Falls, 
   and Lava Creek ash beds (Pearlette family ash beds) of 
   Pleistocene age in the western United States and southern 
   Canada: U.S. Geological Survey Miscellaneous Investigations 
   Series Map, I-1325, 1 sheet, scale 1:4,000,000
Usage in Publication:
Huckleberry Ridge ash*

Modifications: Geologic Province: Dominant Lithology:
 Areal limits
 Many basins
 

Summary:
Huckleberry Ridge ash, an informal designation for an ash 2.02 m.y. old that is the downwind equivalent of the Huckleberry Ridge Tuff of the Yellowstone National Park area. Was formerly called Pearlette type B. The downwind equivalent has been recognized in CA; Great Basin province and Wasatch uplift, ID; Central Montana uplift, MT; Great Basin province of UT and NV; Salina basin, NE; Forest City basin, IA; Anadarko and Sedgwick basins, KS; Permian and Anadarko basins, and Amarillo arch, TX. Inferred areal limits map.
Source: GNU records (USGS DDS-6; Denver GNULEX).


Publication:
Love, J.D., 1989, Names and descriptions of new and reclassified 
   formations in northwestern Wyoming, IN Love, J.D., ed., 
   Geology of the Teton-Jackson Hole region, northwestern Wyoming: 
   U.S. Geological Survey Professional Paper, 932-C, p. C1-C45. 
   [Available online from the USGS PubsWarehouse:  http://
   pubs.er.usgs.gov/pubs/pp/pp932C]
Usage in Publication:
Huckleberry Ridge Tuff*

Modifications: Geologic Province: Dominant Lithology:
 Areal limits
 Isotopic dating
 Yellowstone province
 

Summary:
Rocks assigned to Huckleberry Ridge in this paper on Signal Mountain (T45N, R114W), Teton Co, WY, Yellowstone province, were formerly considered part of Bivouac Formation (abandoned). Also present in subsurface north of Signal Mountain. Rocks formerly assigned to Bivouac are divisible into (ascending order): unnamed gravel of late Miocene age; Conant Creek Tuff of early Pliocene age; deposits of glaciation 1 of Pliocene age; and Huckleberry Ridge Tuff of latest Pliocene age. Using revised constant, the earlier age of 1.9 Ma is recalculated as 2.02 +/-0.8 Ma or Pliocene, a date used by some as the Pliocene-Pleistocene boundary. Measured sections.
Source: GNU records (USGS DDS-6; Denver GNULEX).