Arkansas Aquariums
A public aquarium (plural: public aquaria or public aquariums) is the aquatic counterpart of a zoo, housing aquatic species for viewing. Most public aquaria feature a number of smaller tanks, as well as those greater in size than could be kept by most any home aquarist. Since the first public aquriums built in in the mid-1800s they have become very popular and their numbers have dramatically increased. Most modern aquaria focus on conservation issues and educating the public.
Modern day aquarium tanks can hold millions of U.S. gallons of water and can house large species, including dolphins, sharks or beluga whales. This is accomplished though thick, clear acrylic glass windows. Aquatic and semiaquatic mammals, including otters, and seals are often cared for at aquaria. Some establishments, such as the Oregon Coast Aquarium, have aquatic aviaries.
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The Delta region is bisected by an unusual geological formation known as Crowley's Ridge. A narrow band of rolling hills, Crowley's Ridge rises from 250 to 500 feet (150 m) above the surrounding alluvial plain and underlies many of the major towns of eastern Arkansas.
Northwest Arkansas is part of the Ozark Plateau including the Boston Mountains, to the south are the Ouachita Mountains and these regions are divided by the Arkansas River; the southern and eastern parts of Arkansas are called the Lowlands. All of these mountains ranges are part of the U.S. Interior Highlands region, the only major mountainous region between the Rocky Mountains and the Appalachian Mountains. The highest point in the state is Mount Magazine in the Ozark Mountains; it rises to 2,753 feet (839 m) above sea level.
Arkansas is home to many caves, such as Blanchard Springs Caverns. It is also the first U.S. state in which diamonds were found (near Murfreesboro). Arkansas has the only operating diamond mine in the United States.
