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Chondrites are stone meteorites and contain calcium and aluminium-rich inclusions ( CAIs ) , which are the oldest of all planetary materials , formed very soon after the initial collapse of the solar nebula . Parents of young children in Moore County have stated concern about their children being too aggressive and not knowing how to deal with anger . The bases are matched in pairs : A with T , and C with G. For example , process waste waters and fractions with high contaminant concentrations from the process engineering work groups will be further treated in the Area B projects , and the synergetic and antagonistic interactions of coexisting contaminant classes are to be described in close cooperation with the analytical sub-projects . Chondrites are some of the most primitive rocks in the solar system . The investigations into direct biological soil treatment , on the analytics of the original contaminants and of the metabolites formed during biological treatment which took place in the second research period will be extended to more complex systems : systems in which several contaminant classes are simultaneously present and real mixed-type contaminations . Chondrites : Chondrites are the most primitive meteorites . Chondrites are the materials from which the solar system formed and have been little changed compared with rocks from the larger planets , which have been subjected to billions of years of geological activity .