Southeastern Clay

Sachtleben Chemie (Germany) Southeastern Clay Tinfos (Norway)... 

Southeast Texas Poison Center, 317 Southeastern Clay Company, 248... 

Crown Clay. [Southeastern Clay] Hard rubber clay. 

The composition of fine particles varies from region to region, depending on the precursor emissions. In the northeastern USA, central Europe, and southeastern Asia, more than half of the composition is made up of sulphate particles, due to the combustion of high-sulphur coal and oil. The rest is made up of nitrate particles, carbonaceous material (elemental and organic carbon), and crustal matter (fugitive particles from soil, clay, and rock erosion). 

Mankin, C.J. and Dodd, C.G., 1963. Proposed reference illite from the Ouachita Mountains of southeastern Oklahoma. Clays Clay Minerals, Proc., 10 373-379. 

Johnsson M. J., Ellen S. D., and McKittrick M. A. (1993) Intensity and duration of chemical weathering an example from soil clays of the southeastern Koolau mountains, Oahu, Hawaii. Geol. Soc. Am. Spec. Publ. 284, 147-170. 

The red clays and silts in the upper level of the cave probably represent wind-blown material washed into the cave from the ground surface. They presumably represent the effects of one of the major periods of aridity that affected the landscape of southeastern Australia in the early Pleistocene, prior to 780 ka. 

In the case of the Lower Kittanning seam, therefore, whether iron was transported in organic-rich colloids or was associated with clays, iron availability would tend to be higher in those areas which received an influx of freshwater and detritus. The brackish zone in the southeastern part of the basin thus represents an optimization of iron and sulfate availability and pH level of the swamp waters. 

A few thin lenses of tight, gray, plastic clay also occur in the residuum beneath the study field. The clay is dense and contains small fragments of chert and silicified limestone. The maximum observed thickness of the clay lenses is 5 ft in the southeastern corner of the field. Although they are areally restricted, the clay lenses act as semiconfining zones. 

All of the clay minerals given in Table I may occur in the clay fractions of soils. They often occur in mixtures, but frequently one mineral predominates. Kaolinite and vermiculite generally characterize acid soils of the Southeastern United States. Illite and other clay-sized micas are common in the Northeast and the Midwest. Montmorillonite occurs commonly in the neutral and alkaline soils of the Midwest and Western states. However, any and all of the clays can and do occur throughout soils of the United States, depending on the natural parent material and the formation conditions. Other details concerning clay minerals are described in the works of Grim (28), Marshall (31), and Bear (32). 

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