Complex sentence: The Appekunny Formation contains bedding structures, which have being classified as the remains of the possibly oldest metazoan (animal) on Earth, pushing the limits of the origin of the metazoans one billion years back.
Split into simpler sentences: The Appekunny Formation contains bedding structures, which have being classified as the remains of the possibly oldest metazoan (animal) on Earth. Pushing the limits of the origin of the metazoans one billion years back.