Petrographic Study of Thermal and Shock Metamorphism of the Hungarian

Introduction We investigated two processes in a series of the Hungarian L-chondrites: shock and thermal metamorphism. Thermal metamorphism transforms the textures in the relatively small chondritic planetary body. Shock metamorphism is caused by hypervelocity impact processes transforming texture and mineral structure mainly in the outermost layers of the chondritic planetary body [1,2]. The purpose of this optical microscopic study is to indentify the degree of thermal metamorphism and stages of shock metamorphism in the selected Hungarian meteorites, which have not been described well, up to date.