Draft:Milltown Volcano
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Hoover Hill (alternatively Milltown Volcano) is the local name for a hill on the United States Geological Survey Branchville 7.5-minute map.[1][2][3] It is a small hill range in Milltown Borough, of Middlesex County, New Jersey in the United States. Hoover Hill rises about 70 feet (21 m) above the brook. This hill lies entirely within private, posted property. This nondescript hill is the surface expression of a diatreme that is the northern part of the Late Ordovician Beemerville Alkaline Complex.[4][5]
Composition
[edit]Hoover Hill is an isolated, rounded, tree-covered monadnock in an otherwise relatively flat valley, surrounded by forest. The peak of Hoover Hill is approximately 1,893 feet (577 meters) above sea level.[6] It is the eroded remnant of what was an active volcano approximately 47 million years ago, making it one of the youngest volcanoes on the east coast of North America.[7]
References
[edit]- ^ Aurousseau, M, and HS Washington (1922) The Nephelite Syenite and Nephelite Porphyry of Beemerville, New Jersey. The Journal of Geology. 30(7):571-586.
- ^ United States Geological Survey (1954) Branchville Quadrangle New Jersey- Sussex Co. 7.5 minute Series (Topographic) United States Geological Survey, Reston, Virginia.
- ^ United States Geological Survey (2011) Branchville Quadrangle New Jersey- Sussex Co. 7.5 minute Series (Topographic) United States Geological Survey, Reston, Virginia.
- ^ Ghatge, SL, DL Jagel, and GC Herman, (1992) Gravity investigations to delineate subsurface geology in the Beemerville intrusive complex area, Sussex County, New Jersey. Geologic Map Series no. 92-2. New Jersey Geological Survey, Dept. of Environmental Protection and Energy, Division of Science and Research, Trenton, New Jersey.
- ^ Maxey, LR (1976) Petrology and geochemistry of the Beemerville carbonatite-alkalic rock complex, New Jersey. Geological Society of America Bulletin. 87(11):1551-1559
- ^ "Mole Hill Topo Map, Rockingham County VA (Bridgewater Area)". TopoZone. Retrieved 2018-06-11.
- ^ Jonathan L. Tso; Ronald R. McDowell; Katharine Lee Avary; David L. Matchen & Gerald P. Wilkes (2004). "Middle Eocene Igneous Rocks in the Valley and Ridge of Virginia and West Virginia". Circular 1264. United States Geological Survey.