The abstract summarizes a study of early Silurian "hot shales" from North Africa and the Middle East using chitinozoans. Chitinozoans help provide high-resolution biostratigraphy to identify and date multiple "hot shale" intervals in the lower Silurian, rather than a single unit as previously thought. Analysis of cores from southern Jordan and southwestern Libya show that one "hot shale" in each core is the same mid-Rhuddanian age. Similarities between the shales, such as decreases in chitinozoans and increases in total organic carbon, suggest deposition under similar environmental conditions. The study demonstrates the importance of biostratigraphy, including using chitino