41. It formed by retrograde metamorphism and oxidation of tactite, also resulting in kinoite. 42. Mesosiderites are breccias which show signs of metamorphism . 43. Complex experienced regional metamorphism in the early Paleozoic. 44. Some show granulite facies metamorphism , but most are the slightly lower temperature amphibolite facies. 45. This is termed burial metamorphism , and it can result in rocks such as jade. 46. Where both heat and pressure play a role, the mechanism is termed regional metamorphism . 47. Three types of metamorphism exist : regional. 48. Contact metamorphism occurs typically around country rock. 49. Contact metamorphism is greater adjacent to the intrusion and dissipates with distance from the contact. 50. They presented evidence of shock metamorphism , which is consistent with similar impact crater sites.
