Hughes Mountain and the Hughes Mountain State Natural Area:

Hughes Mountain-Devils Honeycomb

Within the Hughes Mountain Natural Area is a glade with an outcrop of columnar jointed rhyolite designated the Devil’s HoneycombDevil’s Honeycomb is listed in the book, Geographic Wonders and Curiosities of Missouri. Two-thirds of the area is wooded. The forest is dominated by post and white oaks with areas of stunted specimens of blackjack oak and black hickory.

The area’s glades are natural openings on western or southern slopes and are dominated by native grasses and a variety of wildflowers. Glades occur where the soils are extremely thin and usually include areas of exposed bedrock.

The area around Hughes Mountain was first settled ca 1810 by John Hughes, his wife (Susannah) and their children, resulting in the mountain being named Hughes Mountain. The mountain itself remained public land until 1861 when purchased by John Hughes’s son, Mahlon Hughes and afterwards remained in the Hughes family until it was purchased by the Missouri Conservation Commission in 1982. At that time it was designated a State Natural Area.

The Hughes Mountain State Natural Area can be accessed by the public via a 1.4 mile (2.253 kilometers) linear/loop trail with the trail head in a small parking area on Highway M 3 miles (4.8 km) southeast of Irondale. Within the Hughes Mountain Natural Area is a glade with an outcrop of columnar jointed rhyolite designated the Devil’s Honeycomb. Devil’s Honeycomb is listed in the book, Geographic Wonders and Curiosities of Missouri. The natural area is divided between forest land (about 2/3 the total area) containing three types of forests, and glades(about 1/3 the total area).

 (5 mi. east on Hwy M from Hwy 21)

Hughes Mountain is a peak in the St. Francois Mountains Range of southeastern Missouri. These granite and rhyolite rocks of these mountains formed 1.485 billion years ago during the Proterozoic Eon when the area was volcanically active.[8] Hughes Mountain is formed of extrusive rhyolite which fractured into vertical joints when it cooled, creating polygonal columns. These columns have from four to six sides and are up to three feet (0.91 m) tall. When viewed from above they resemble a honeycomb.

Columnar jointing is not limited to rhyolite formations. The Devils Honeycomb is a smaller example of the sort of columnar jointing found at Devils Tower National Monument in WyomingDevils Postpile National Monument in California, and the Giant’s Causeway near Bushmills,Northern Ireland.

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Hughes Mountain Natural Area
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