41. By comparison, the oldest dated continental crust is. 42. The magma was contaminated with continental crust material. 43. The rise most probably originates from subsided continental crust that fragmented as Australia and Antarctica separated. 44. Sill-like intrusions of basalt into lower continental crust . 45. But even as the debate over ancient continental crust heats up, the terrain itself is cooling. 46. It is now known that there are two kinds of crust : continental crust and oceanic crust. 47. Thus incompatible elements are those that are enriched in the continental crust and depleted in the mantle. 48. The Cameroon volcanic line is geologically unusual in extending through both the ocean and the continental crust . 49. Delamination occurs when the lower continental crust and mantle lithosphere break away from the upper continental crust . 50. It is thought that the melting and reworking of oceanic crust formed the early Archean continental crust .
