| 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. |
| The velocity of compressional waves in rocks to 10 kilobars. |
| Experimental work shows that pelitic rocks composed primarily of talc and kyanite, which are referred to as whiteschists, can be stable from pressures of approximately 6 kilobars up to greater than 30 kilobars. |
