Complex sentence: The high ‐ grade metamorphic rocks of Enderby Land, which form part of the East Antarctic Precambrian Shield, have been subdivided into two major metamorphic complexes--the Archaean Napier Complex and the Proterozoic Rayner Complex.
Split into simpler sentences: The high ‐ grade metamorphic rocks of Enderby Land, which form part of the East Antarctic Precambrian Shield, have been subdivided into two major metamorphic complexes. These are the Archaean Napier Complex and the Proterozoic Rayner Complex.