Soil Orders

Alfisols - moderately leached and high native fertility, clays accumulated on subsurface horizon, found under forests in temperate humid and sub-humid climates (10.1% of ice-free land, supports 17% of population)

Andisols - formed from volcanic ash, has antic properties, making it able to hold water at a high capacity and make phosphorous unavailable to plants (1% of ice-free land)

Aridisols - found in arid regions, contains calcium carbonate, dry through most of the year, some subsurface horizons (12% of ice-free land)

Entisols - of recent origin, very diverse, any soil that doesn't fit other categories (18% of ice-free land)

Gelisols - have permafrost within 2 meters of the surface; found near high-latidude polar regions and at high altitudes in localized areas (9.1% of ice-free land, supports 0.4% of population)

Histosols - organic soils; 20% - 30% organic matter by weight; 40 centimeters thick; mostly found in wetlands where lack of drainage slows decomposition of organic matter (1.2% of ice-free land)

Inseptisols - minimal horizon development, found in wide range of climates, often on steep slopes, young geomorphic surfaces, and on resistant parent materials (15% of ice-free land, supports 20% of population)

Mollisols - dark and thick surface horizon, found in grasslands, productive agriculturally (7% of ice-free land area)

Oxisols - weathered soils found in inter-tropical regions, often have aluminum and iron oxide minerals but few weathered minerals (7.5% of ice-free land)

Spodosols - acid forest soils, have subsurface accumulation of metal-humas complexes with Aluminum and Iron; found under coniferous forests in moist and cool climates (4% of ice-free land)

Ultisols - acid forest soils, strongly leached, mostly in humid temperate and tropical parts of the world (8.1% of ice-free land, supports 18% of population)

Vertisols - clay-rich, shrinks and cracks when dry, expands with moisture (2.4% of ice-free land)

More information about soil orders of the world

The state of Georgia has mostly ultisols, but it also has spodosols, entisols, inceptisols, and alfisols.

Soils of the Southeast

Micaceous schists are metamorphic rocks of medium grade flaked with mica. Schists are foliated, or layered, along approximately parallel lines through geologic metamorphosis, and they are made up of at least 50% platy and elongated minerals. A micaceous schist is so named because of the large amount of mica present in the rock.

More information about Micaceous Schists