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QAPF diagram with basalt/andesite field highlighted in yellow. Andesite is distinguished from basalt by SiO 2 > 52%. Andesite is field O2 in the TAS classification.. Andesite is an aphanitic (fine-grained) to porphyritic (coarse-grained) igneous rock that is intermediate in its content of silica and low in alkali metals.
The Bearwallow Mountain Andesite is composed of calc-alkaline volcanic rock ranging from basaltic andesite to dacite, but predominantly andesite.These form a group of low cones or shield volcanoes and range in age from 27 to 23 million years old.
Andesites is an extinct genus of cephalopod belonging to the Ammonite subclass, from the Late Jurassic. It has only been found in the Mendoza Group of Argentina. [1]
The Felsenthal National Wildlife Refuge (NWR) is a 76,000 acre (307.56 km 2) national wildlife refuge located in south-central Arkansas in Ashley, Bradley, and Union counties. Felsenthal NWR is one of three refuges forming an administrative complex, which also includes Pond Creek NWR to the northwest and Overflow NWR to the east. [2]
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Arkansas is located in Tornado Alley, and as a result, a few of the most destructive tornadoes in U.S. history have struck the state. While sufficiently far from the coast to avoid a direct hit from a hurricane, Arkansas can often get the remnants of a tropical system , which dumps tremendous amounts of rain in a short time and often spawns ...
Cane Creek State Park is a 2,053-acre (831 ha) Arkansas state park in Lincoln County, Arkansas in the United States.Straddling the Gulf Coastal Plain and the Mississippi Delta, the park includes the 1,675-acre (678 ha) Cane Creek Lake, a wooded lake which borders Bayou Bartholomew, the world's longest bayou. [2]
Flatside Wilderness is located in southern Perry County and northwestern Saline County, though most of it (about 70%) is in Saline County.It is approximately 8 miles north of Hot Springs Village and 21 miles west of Little Rock, and is accessible from Arkansas Highway 7 and Arkansas Highway 9.