An ultrahigh pressure ductile shear melange crops out on the beach of Yangkou Bay near Qingdao City. The melange is composed of weakly deformed blocks in a highly ductilly flow mylonites. Ultrahigh pressure meta-morphic (UHPM) tectonite includes strongly deformed ec-logite and mylonitized eclogite. Coesite occurs in the tectonite as both interstitial mineral and inclusions in garnet and omphacite, indicating that the deformation took place in the stability field of coesite (800-850°C, >30 GPa) in the upper mantle. Coesite is rounded or short prismatic grains with undulatory extinction, and often fractured, suggesting brittle deformation. Garnet is also characterized by brittle fractures and sometimes necked and slightly elongated. Omphacite is elongated, with long axis preferred orientation. Undulatory extinction, subgrains and dynamically recrystallized grains suggest plastic flow of omphacite. Ultrahigh pressure meta-morphic tectonite was probably formed in the ductile shear zone during the early stag An ultrahigh pressure ductile shear melange crops out on the beach of Yangkou Bay near Qingdao City. The melange is composed of weakly deformed blocks in a highly ductilly flow mylonites. Ultrahigh pressure meta-morphic (UHPM) tectonite contains strongly deformed ec-logite and mylonitized eclogite. Coesite occurs in the tectonite as both interstitial mineral and inclusions in garnet and omphacite, indicating that the deformation took place in the stability field of coesite (800-850 ° C,> 30 GPa) in the upper mantle. Coesite is rounded or Short prismatic grains with undulatory extinction, and often fractured, suggesting brittle deformation. Garnet is also characterized by brittle fractures and sometimes necked and slightly elongated. Omphacite is elongated, with long axis preferred orientation. Undulatory extinction, subgrains and dynamically recrystallized grains suggest plastic flow of omphacite. Ultrahigh pressure meta-morphic tectonite was probably formed in the ductile shear zone du ring the early stag