Quercus marilandica, the blackjack oak, is a small oak, one of the red oak group Quercus sect. Lobatae. It is native to the eastern and central United States, from Long Island to Florida, west as far as Texas, Oklahoma, and Nebraska. There are reports of a few isolated populations in southern Michigan, but these appear to represent introductions.
Washington County is a regional economic, educational, and cultural hub in the Northwest Arkansas region. Created as Arkansas's 17th county on November 30, 1848, Washington County has 13 incorporated municipalities, including Fayetteville, the county seat, and Springdale. The county is also the site of small towns, bedroom communities, and unincorporated places. The county is named for George Washington, the first President of the United States
Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood.
Missouri, a state near the geographical center of the United States, has three distinct physiographic divisions:
The Ozarks, also known as the Ozark Mountains or Ozark Plateau, is a physiographic region in the U.S. states of Missouri, Arkansas, Oklahoma and the extreme southeastern corner of Kansas. The Ozarks cover a significant portion of northern Arkansas and most of the southern half of Missouri, extending from Interstate 40 in central Arkansas to Interstate 70 in central Missouri.
A geode is a geological secondary formation within sedimentary and volcanic rocks. Geodes are hollow, vaguely spherical rocks, in which masses of mineral matter are secluded. The crystals are formed by the filling of vesicles in volcanic and sub-volcanic rocks by minerals deposited from hydrothermal fluids; or by the dissolution of syn-genetic concretions and partial filling by the same, or other, minerals precipitated from water, groundwater or hydrothermal fluids.
The Current River forms in the southeastern portion of the Ozarks of Missouri and becomes a 7th order stream as it flows southeasterly out of the Ozarks into northeastern Arkansas where it becomes a tributary of the Black River, which is a tributary of the White River, a tributary of the Mississippi River. The Current River is approximately 184 miles (296 km) long and drains about 2,641 square miles (6,840 km2) of land mostly in Missouri and a small portion of land in northeastern Arkansas. The headwaters of the Current River are nearly 900 feet (270 m) above sea level, while the mouth of the river lies around 280 feet (85 m) above sea level. The basin drains a rural area that is dominated by karst topography, underlain by dolomite and sandstone bedrock with a small area of igneous rock southeast of Eminence, Missouri. The annual daily mean discharge of the river near Doniphan, Missouri is 2,815 cubic feet (79.7 m3) per second. In 1964, over 134 mi (160 km) of the upper course of the river and its tributaries were federally protected as the Ozark National Scenic Riverways, the first national park in America to protect a river system.
The Onondaga Limestone is a group of hard limestones and dolomites of Devonian age that form an important geographic feature in some areas in which it outcrops; in others, especially its Southern Ontario portion, the formation can be less prominent as a local surface feature.
The Missouri Rhineland is a geographical area of Missouri that extends from west of St. Louis to slightly east of Jefferson City, located mostly in the Missouri River Valley on both sides of the river. Dutzow, the first permanent German settlement in Missouri, was founded in 1832 by Baron von Bock. The area is named after the Rhineland region in central Europe, a wine-growing area around the Rhine river, by German-Americans who noticed similarities in the two regions' soil and topography.
Rockbridge is an unincorporated community in northern Ozark County, Missouri, United States. It is the site of an old mill on spring fed Spring Creek, a tributary of Bryant Creek, which still houses the post office. It lies twelve miles north of Gainesville on Missouri Route N, approximately one and one-half miles north of Route 95. The narrow valley floor is only about 650 feet (200 m) wide and at an elevation of 770 feet (230 m) and the Ozark ridges on either side are 200 to 250 feet higher.
Hickory Run State Park is a 15,990-acre (6,471 ha) Pennsylvania state park in Kidder and Penn Forest Townships in Carbon County, Pennsylvania in the United States. The park is spread across the Pocono Mountains. The park is easily accessible from Interstate 476 and Interstate 80.
A calcareous glade is a type of ecological community that is found in the central eastern United States. Calcareous glades occur where bedrock such as limestone occurs near or at the surface, and have very shallow and little soil development. Because of the shallow soil and the extreme conditions created by it, trees are often unable to grow in the glades. This creates a habitat that is usually sunny, dry, and hot. Calcareous glade vegetation is more similar to that of a desert habitat than a grassland, being dominated by small spring annuals with occasional geophytic or succulent perennials.
Washington State Park is a public recreation area covering 2,147 acres (869 ha) in Washington County in the central eastern part of the state of Missouri. It is located on Highway 21 about 14 miles (23 km) northeast of Potosi or 7 miles (11 km) southwest of DeSoto on the eastern edge of the Ozarks. The state park is noted for its Native American rock carvings and for its finely crafted stonework from the 1930s.
Terra rossa is a well-drained, reddish, clayey to silty clayey soil with neutral pH conditions and is typical of the Mediterranean region. The reddish color of terra rossa is the result of the preferential formation of hematite over goethite. This soil type typically occurs as a discontinuous layer that ranges from a few centimeters to several meters in thickness that covers limestone and dolomite bedrock in karst regions. The high internal drainage and neutral pH conditions of terra rossa are a result of the karstic nature of the underlying limestone and dolomite. Terra rossa is also found associated with Mediterranean climates and karst elsewhere in the world.
The Geology of Kansas encompasses the geologic history of the US state of Kansas and the present-day rock and soil that is exposed there. Rock that crops out in Kansas was formed during the Phanerozoic eon, which consists of three geologic eras: the Paleozoic, Mesozoic and Cenozoic. Paleozoic rocks at the surface in Kansas are primarily from the Mississippian, Pennsylvanian and Permian periods.
The geology of Tasmania is complex, with the world's biggest exposure of diabase, or dolerite. The rock record contains representatives of each period of the Neoproterozoic, Paleozoic, Mesozoic and Cenozoic eras. It is one of the few southern hemisphere areas that were glaciated during the Pleistocene with glacial landforms in the higher parts. The west coast region hosts significant mineralisation and numerous active and historic mines.
The Ozark Highlands is a Level III ecoregion designated by the Environmental Protection Agency (EPA) in four U.S. states. Most of the region is within Missouri, with a part in Arkansas and small sections in Oklahoma and Kansas. It is the largest subdivision of the region known as the Ozark Mountains, less rugged in comparison to the Boston Mountains in Arkansas, the highest part of the Ozarks.
Residuum is often used to refer to the soil and subsoil that forms as the result of long weathering over carbonate rocks bedrock. It is defined primarily as “the unconsolidated weathered at least partly, mineral material that has accumulated as consolidated rocks disintegrated in place. It is a type of soil parent material which has formed in place of origin. This distinguishes residuum from most other types of parent material. Parent material is classified by mode of transport.
The Kalemba Rockshelter is an archaeology site located in eastern Zambia, at coordinates 14°7 S and 32°3 E. Local tradition recalls the use of the rock shelter as a refuge during the time of Ngoni raiding in the 19th century. The site is known for various rock paintings as well as advanced microlithic use.
The geology of Missouri includes deep Precambrian basement rocks formed within the last two billion years and overlain by thick sequences of marine sedimentary rocks, interspersed with igneous rocks by periods of volcanic activity. Missouri is a leading producer of lead from minerals formed in Paleozoic dolomite.
