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Mollisol is a soil type which has deep, high organic matter, nutrient-enriched surface soil , typically between 60 and 80 cm (24-31 in) in depth. This fertile surface horizon, called a mollic epipedon, is the defining diagnostic feature of Mollisols.
The primary river of the dunes is the Calumet River. Its three segments were once a single waterway, parallel to the Lake Michigan Shoreline. [4] On the east is Trail Creek in Michigan City, Indiana. The Calumet River is accessible at several locations. The upper reaches are viewable in the Heron Rookery. [2]
The terrain of the Southeastern Plains is dissected, rolling to smooth plains.The Cretaceous sands, silts, and clays of this region contrast geologically with the older metamorphic and igneous rocks of the Piedmont ecoregion, and with the Paleozoic limestone, chert, and shale of the Interior Low Plateaus ecoregion.
The soils, mostly Vertisols and Mollisols, are deep, loamy and clayey, and tend to be finer-textured than in the Lower Rio Grande Valley (34e) to the north. Some Entisols and Inceptisols occur near the river. The floodplain ridges once had abundant palm trees, and early Spanish explorers called the river "Rio de las Palmas." Most large palm ...
Indiangrass thrives in deep, moist, prairie soils, woodland edges and bottomland habitats. In addition to its value as livestock and wildlife forage, Native Americans utilized Indiangrass as ...
This is a large area covering 407,000 square kilometres (157,000 sq mi) from northern Illinois through most of Missouri, eastern Kansas, Oklahoma and into Texas.This area was traditionally a mixture of woodland and tall grass prairie, which as the soil consists of highly fertile mollisols, most of the area has been converted to farmland.
The second sub-ecoregion is the Central USA Plains, an area of 253,665 square kilometres (97,941 sq mi), that has a landform of smooth plains. The majority of this region’s surface material is moraine with some lacustrine, and the soil consists of calcium enriched prairie soils and forest soils on moraine.
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