| Both coesite and stishovite have been synthesized and found to be stable only at high pressures. |
| Experimental studies on the stability of coesite imply minimum pressures of 30 kilobars for these rocks, indicating burial or subduction to depths of approximately 100 kilometres. |
| His discovery of coesite, which became a standard sign of an impact crater, sealed the debate. |
| This is based on preservation of original gabbroic textures and occurrence of intergranular coesite in UHP rocks. |
| Coesite is a denser polymorph of SiO2 found in some meteorite impact sites and in metamorphic rocks formed at pressures greater than those typical of the Earth's crust. |
