 The study examined the dynamic mechanical behavior and fracture characteristics of medium siltstone under different conditions. It was found that the dynamic strength of the material is rate-dependent while its elastic modulus is not. Additionally, two distinct morphologies were observed in the dynamic stress strain response from the CDUC and CSDEL tests. These observations were further confirmed by SEM analysis, which revealed that the post-loading microcrack characteristics differ between the two morphologies. This article was authored by Jun Wang, Ji Wei Ren, Shang Yang, and others.