Bald Knoll

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 37.328°N
  • 112.408°W

  • 2135 m
    7003 ft

  • 327030
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Bald Knoll.

The Global Volcanism Program has no Weekly Reports available for Bald Knoll.

The Global Volcanism Program has no Bulletin Reports available for Bald Knoll.

Basic Data

Volcano Number

Last Known Eruption

Elevation

Latitude
Longitude
327030

Pleistocene

2135 m / 7003 ft

37.328°N
112.408°W

Volcano Types

Pyroclastic cone(s)

Rock Types

Major
Basalt / Picro-Basalt

Tectonic Setting

Rift zone
Continental crust (> 25 km)

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
2
50
1,438
104,763

Geological Summary

Bald Knoll is the youngest of a group of basaltic cinder cones on the SW part of the Paunsaugunt Plateau in southern Utah, between the southern end of Bryce Canyon National Park and the western margin of Grand Staircase-Escalante National Monument. The 2135-m-high Bald Knoll has a well-preserved crater and produced a massive youthful-looking lava flow that traveled about 12 km to the SSE. The olivine-basaltic flow fills the floor of Johnson Valley south of Bald Knoll and reaches beyond Ford Pasture into Johnson Canyon. No precise age for the flow is available, but although it was at one point estimated to be several hundred to several thousand years old (Gregory, 1951), Doehling (2008) noted radiometric dates of 0.34 Ma and older on adjacent lava flows and mapped all flows in this area as no younger than late Pleistocene. Buck Knoll and Black Knoll (also known as Corral Knoll) are cinder cones to the west that lie on the western side of Kanab Creek and produced lava flows that traveled as far as 22 km down the Kanab valley.

References

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Davis G H, Pollock G L, 2003. Geology of Bryce Canyon National Park, Utah. In: Sprinkel D A, Chidsey T C Jr, Anderson P B (eds) {Geology of Utah's Parks and Monuments}, Utah Geol Assoc Publ, 28: 37-60.

Doehling H H, 2008. Geologic map of the Kanab 30'x60' quadrangle, Kane and Washington Counties, Utah and Coconino and Mohave Counties, Arizona. Utah Geol Surv Miscl Pub 08-2DM, 2 plates, GIS data, CD-ROM, scale 1:100,000.

Gregory H E, 1951. The geology and geography of the Paunsaugant region, Utah. U S Geol Surv Prof Pap, 226: 1-116.

Gregory H E, 1950. Geology and geography of the Zion Park region Utah and Arizona. U S Geol Surv Prof Pap, 220: 1-200.

Luedke R G, Smith R L, 1978. Map showing distribution, composition, and age of late Cenozoic volcanic centers in Colorado, Utah, and southwestern Wyoming. U S Geol Surv Misc Invest Ser Map, I-1091-B.

Sarna-Wojcicki A M, Champion D E, Davis J O, 1983. Holocene volcanism in the conterminous United States and the role of silicic volcanic ash layers in correlation of latest Pleistocene and Holocene deposits. In: Wright H E (ed) {Late-Quaternary Environments of the United States}, Minneapolis: Univ Minnesota Press, 2: 52-77.

The Global Volcanism Program is not aware of any Holocene eruptions from Bald Knoll. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Bald Knoll page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Cones

Feature Name Feature Type Elevation Latitude Longitude
Black Knoll
    Corral Knoll
Pyroclastic cone 2024 m 37° 18' 0" N 112° 31' 0" W
Buck Knoll Pyroclastic cone 2085 m 37° 20' 0" N 112° 30' 0" W

The Global Volcanism Program has no photographs available for Bald Knoll.

Smithsonian Sample Collections Database


A listing of samples from the Smithsonian collections will be available soon.

Affiliated Sites

Large Eruptions of Bald Knoll Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.