For example, we know that the metamorphic rock quartzite must have originally been a quartz sandstone (a sedimentary rock), because both rock types are made almost entirely of the mineral quartz and there are no igneous rocks of that composition.
(both rock types; are made almost entirely; of the mineral quartz) (we; know; that the metamorphic rock quartzite must have originally been a quartz sandstone (a sedimentary rock), because both rock types are made almost entirely of the mineral quartz and there are no igneous rocks of that composition.) Context(we know,List([13, 20))):(the metamorphic rock quartzite; must have been; a quartz sandstone (a sedimentary rock; because both rock types are made almost entirely of the mineral quartz and there are no igneous rocks of that composition; T:originally)
we know,List([13, 20))
both rock types we the metamorphic rock quartzite
are made almost entirely know must have been
of the mineral quartz
that the metamorphic rock quartzite must have originally been a quartz sandstone (a sedimentary rock), because both rock types are made almost entirely of the mineral quartz and there are no igneous rocks of that composition.
a quartz sandstone (a sedimentary rock because both rock types are made almost entirely of the mineral quartz and there are no igneous rocks of that composition T:originally