Finely dispersed material from the Kaali meteorite crater field

Mathematics – Logic

Scientific paper

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Meteorite Craters, Meteoritic Composition, Meteoritic Damage, Meteoritic Microstructures, Micrometeoroids, Ablation, Atmospheric Effects, Impact Damage, Soils

Scientific paper

A study has been made of the morphological properties of finely dispersed material of the Kaali meteorite initially taken from 50 soil samples from different points of the crater field. It is shown that finely dispersed material is found in the soil in significant quantities and has great qualitative diversity. Several groups of finely dispersed material (FDM) have been found: crusts, spherules, platelets, micrometeorites, and impactites. Each of the groups is represented by a number of characteristic genetic types for which quantitative relationships have been determined. Criteria are discussed for distinguishing two components of FDM: an alpha component formed by ablation during the meteor's passage through the atmosphere, and a beta component formed in the explosions and vaporization during crater formation. A comparison is made with the FDM from other regions of meteorite falls.

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