The metamorphic rocks, which are derived from igneous and sedimentary rocks by alteration under heat and pressure, are regarded as belonging to their initia1 types, and are neglected in the following calculation.
(The metamorphic rocks; are derived; from igneous and sedimentary rocks; by alteration under heat and pressure) (The metamorphic rocks, which are derived from igneous and sedimentary rocks by alteration under heat and pressure; are regarded; as belonging to their initia1 types) (The metamorphic rocks, which are derived from igneous and sedimentary rocks by alteration under heat and pressure; are neglected; L:in the following calculation)
The metamorphic rocks The metamorphic rocks, which are derived from igneous and sedimentary rocks by alteration under heat and pressure The metamorphic rocks, which are derived from igneous and sedimentary rocks by alteration under heat and pressure
are derived are regarded are neglected
from igneous and sedimentary rocks by alteration under heat and pressure
as belonging to their initia1 types
L:in the following calculation