Basalt can be formed by partial melting of this pyrolite , which drives off the enriched basalt magma, leaving behind the depleted dunite.
(Basalt; can be formed; by partial melting of this pyrolite) (this pyrolite; drives; off; the enriched basalt magma)
Basalt this pyrolite
can be formed drives
by partial melting of this pyrolite
off the enriched basalt magma