![]() Johnsons Shut-Ins State Park can be contacted at (573) 546-2450 or. Then the river hits the more resistant igneous rock and the valley becomes narrow and steep-sided or “shut in.” Along the banks of the stream look for the Ozark witch hazel which blooms in late winter and early spring. Johnsons Shut-Ins State Park is located at 148 Taum Sauk Trail, Middle Brook MO 63656. Rhyolite rock (another kind of igneous rock) is formed from magma and volcanic ash and debris flows that spewed out onto the earth’s surface and then cooled.Ībove the park the East Fork of the Black River flows through a broader valley formed in dolomite bedrock. CRX9J9 from Alamys library of millions of. Granite rock (a type of igneous rock) is formed from magma that cooled below the earth’s surface and then was exposed later. Download this stock image: Johnsons Shut-ins State Park is one of the the most popular Missouri state parks. Igneous rock is one formed from molten rock, magma, and other volcanic materials (e.g., ash deposits). The story of Johnson’s shut-ins starts over a billion years ago when the igneous rocks here, pink granites and blue-gray rhyolites, were formed from volcanic activity. Most of the park, including the shut-ins and two miles of river frontage, was assembled over the course of 17 years and donated to the state in 1955 by Joseph. The shut-ins are the most interesting natural water slide in Missouri and the rock here is smooth so mind your step and the rapids move fast.
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