The relationship between the Fo content of olivine  and the Cr/(Cr+Al) atomic ratio (=Cr#) of spinel in spinel peridotites (Arai, 1997) is often used for discr…

Today, I will make a bathymetric map using R. We can easily change the color of the map and plot our data on the map using R.  (QGIS is also very useful!!) Dat…