Fe/Ni Fe/Mg Increasing Fe toward core Increasing Si toward surface There are certain trends in Earths chemistry. The crust is relatively depleted in Fe,
Early Earth …earliest phase of Earth heating… …first seas… …thin atmosphere of H, CO 2, H 2 O, N 2, CO, NH 3, CH 4 …early bombardment…
The continental rifting process a q Kk. Subduction Continental Crust Oceanic Crust Accretionary Prism Volcanic Arc Trench RiftingSpreading Center Granite.
