Grain-Size Characteristics of Pyroclastics in
Through field investigation of pyroclastic deposit sections in the study area, the authors systematically collected different pyroclastic deposit samples at different sites, and then calculated the grain size parameters and plotted out the probability cumulative curves of all samples in the laboratory. The results indicate that the pyroclastic samples from different origins can be distinguished by characteristic grain-size diagrams. In terms of texture, most pyroclastic deposits show similar characters.