Midnight Volcano

Midnight Volcano is believed to be a buried extinct volcano in southern Humphreys County, Mississippi. It is named after the nearby town of Midnight, Mississippi. During the time it was active, Midnight Volcano may have been a volcanic island in the Mississippi Embayment.[1]

The volcanic activity in the area is associated with the Monroe Uplift,[2][3] and igneous rocks in the region have been dated from 84 to 73 Ma.[4] A well drilled in Humphreys County found around 600 m (2000 ft) of volcanic rock, starting 1110 m (3641 ft) below the surface at the shallowest.[5] The most recent measured volcanic rock was dated to 66 Ma,[6] while older (and deeper) samples were dated at 81 and 94 Ma.[7]

These most recent deposits roughly coincide with the activity of Jackson Volcano, another buried volcano southeast of Midnight[8]

Volcanic debris from this volcanism was also found in the "Coffee sands", a Cretaceous sand layer to the north.[2]

See also

References
  1. "Ask Rufus: Tombigbee sharks and Mississippi volcanoes". The Commercial Dispatch. Retrieved June 11, 2018.
  2. Mellen, Frederic Francis (April 18, 1958). "Cretaceous Shelf Sediments of Mississippi, Mississippi State Geological Survey, Bulletin 85" (PDF). pp. 23–24. Retrieved June 11, 2018.
  3. Pitts, Bill. "NSV Whatever Happened To...?". www.newsouthernview.com. Retrieved June 11, 2018.
  4. Cox, Randel Tom (September 2002). "The Mississippi Embayment, North America: A first order continental structure generated by the Cretaceous superplume mantle event". Journal of Geodynamics. 34 (2): 163–176. Bibcode:2002JGeo...34..163C. doi:10.1016/S0264-3707(02)00019-4 – via ResearchGate.
  5. Baksi, Ajoy (1997). "The Timing of Late Cretaceous Alkalic Igneous Activity in the Northern Gulf of Mexico Basin, Southeastern USA". The Journal of Geology. 105 (5): 629–643. Bibcode:1997JG....105..629B. doi:10.1086/515966. JSTOR 10.1086/515966. S2CID 129911825.
  6. Merrill, Robert (1981). "Genesis of bentonite in the Upper Cretaceous strata of Monroe County, Mississippi". Report of Student Investigations (Mississippi Mineral Resources Institute). University of Mississippi Library, Special Collections. 820.
  7. Sundeen, Daniel A.; Cook, Philip L. (August 1, 1977). "K-Ar dates from Upper Cretaceous volcanic rocks in the subsurface of west-central Mississippi". GSA Bulletin. 88 (8): 1144–1146. Bibcode:1977GSAB...88.1144S. doi:10.1130/0016-7606(1977)88<1144:KDFUCV>2.0.CO;2. ISSN 0016-7606.
  8. Livesey, Christina Lee (1990). "Petrogenesis and Provenance of Epiclastic Volcanic Cobbles From the Cretaceous Woodbine Formation, Southwest Arkansas". LSU Historical Dissertations and Theses 4933. Retrieved November 11, 2018.

33.049040°N 90.573494°W / 33.049040; -90.573494


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