Robuta

https://www.usgs.gov/publications/ophiolites-and-oceanic-crust Ophiolites and oceanic crust | U.S. Geological Survey OPHIOLITES consist of a pseudostratiform sequence, of harzburgite, tectonite, ultramafic and mafic cumulates sometimes including gabbro and quartz diorite... oceanic crustophiolitesgeologicalsurvey https://www.sciencedaily.com/releases/2019/02/190206131936.htm Fate of the subducted oceanic crust revealed by laboratory experiments | ScienceDaily Laboratory experiments at extreme pressures and temperatures lead to precise measurements of the sound velocity of CaSiO3 perovskite which is one of the... of theoceanic crustby laboratoryfatesubducted