Complex sentence: Obsidian of the same type has been found at early Maori sites at Shag River and Tai Rua, Otago on the South Island of New Zealand and there are also similarities to the Raoul settlement at archaic sites at Houhora and Papatowai.
Split into simpler sentences: Obsidian of the same type has also been found at early Maori sites at Shag River and Tai Rua, Otago on the South Island of New Zealand. There are also similarities to the Raoul settlement at archaic sites at Houhora and Papatowai.