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Novaculite, also called Arkansas Stone, is a microcrystalline to cryptocrystalline rock type that consists of silica in the form of chert or flint. It is commonly white to grey or black in color, with a specific gravity that ranges from 2.2 to 2.5.
The term is based on the word "whet", which means to sharpen a blade, [2] [3] not on the word "wet". The verb nowadays to describe the process of using a sharpening stone for a knife is simply to sharpen, but the older term to whet is still sometimes used, though so rare in this sense that it is no longer mentioned in, for example, the Oxford Living Dictionaries.
Ganister – Hard, fine-grained quartzose sandstone, or orthoquartzite; Gossan – Intensely oxidized, weathered or decomposed rock; Hyaloclastite – Volcaniclastic accumulation or breccia; Ijolite – Igneous rock consisting essentially of nepheline and augite; Jadeitite – Metamorphic rock found in blueschist-grade metamorphic terranes
Initially, Arkansas bauxite met 90% of US aluminum demand. Underground mining before and during World War II gave way to open pit mining in the 1960s. During the war, up to six million tons were mined in 1943. Arkansas bauxite mines were often passed over in favor of higher quality bauxite reserves in the Caribbean and mining ceased in 1982.
The "Giant Flowstone" in Blanchard Springs Caverns, seen on the Discovery Tour. Blanchard Springs Caverns is a cave system located in the Ozark–St. Francis National Forest in Stone County in northern Arkansas, USA, 2 miles (3.2 km) off Highway 14 a short distance north of Mountain View. [1]
The following are tallies of current listings in Arkansas on the National Register of Historic Places. These counts are based on entries in the National Register Information Database as of April 24, 2008 [2] and new weekly listings posted since then on the National Register of Historic Places web site. [3]
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