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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.
Natural whetstones are typically formed of quartz, such as novaculite. The Ouachita Mountains in Arkansas are noted as a source for these, giving them the name "Arkansas stones". Novaculite is very hard and has small crystals (3-5 microns ), making it suitable for the later fine stages of knife sharpening.
Leaders of states in the U.S. which have significant mineral deposits often create a state mineral, rock, stone or gemstone to promote interest in their natural resources, history, tourism, etc. Not every state has an official state mineral, rock, stone and/or gemstone, however.
The Ozark Southern Stone quarry is a quarry located in Elk Ranch, Arkansas, rich in dolomite limestone. It began in 1883 as Eureka Stone Co., and remained open until the Great Depression. It became Ozark Southern stone in 2006. Its stone has been used in building in the northwest Arkansas region, in Kansas City, Missouri, and elsewhere
Level III subdivides the continent into 182 ecoregions; of these, seven lay partly within Arkansas's borders. Level IV is a further subdivision of Level III ecoregions. There are 32 Level IV ecoregions in Arkansas, [2] many of which continue into adjacent areas in the neighboring states of Oklahoma, Mississippi, Missouri, Louisiana, Tennessee ...
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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