Stratigraphie der jüngeren Pyroklastika der Sierra Nevada de Mexico durch schwermineralanalytische und pedologische Untersuchungen

Günter Miehlich
Heavy mineral analytic and soil tests with more than 200 samples were used for verifying a macroscopically elaborated stratigraphy of the more recent pyroclasts of the Sierra Nevada de Mexico. Heavy mineral relationships are not suitable for the differentiation of ash layers, which cannot be separated macroscopically. They are either too similar or variation within one layer is very strong, which may be attributed primarily to sorting of ashes in relation to the distance from...