Since then, an international team has been analyzing the composition of the mantle, especially its minerals. Harzburgite — a variety of peridotite — is the main rock within the core.

The mantle sequence is 3-8 km thick (Dewandel et al. 2005) and is comprised of peridotite (~30% of the ophiolite) (Kelemen and Matter 2008), overlain by gabbros. The original crustal material is ...

The Atlantis Massif is an oceanic core complex, a portion of lower crustal gabbroic rocks and peridotite mantle rocks uplifted during faulting of the seafloor (e.g. Ildefonse et al., 2007) that formed ...