The difference in color indicates the concentration of titanium that the rock has, with the green particles having the lowest concentrations (about 1%), and red particles having the highest concentrations (up to 14%, much more than the basalts with the highest concentrations).
Farveforskellene skyldes forskelle i klippens titaniumkoncentration, idet de grønne partikler har den mindste (omkring 1%), mens de røde har den højeste (op til 14%, meget mere end de basalter, som har den højeste koncentration).