Complex sentence: Several (9 or 10) oceanic plates were completely subducted and their remains has formed paired metamorphic belts, most recent plate been Izanagi Plate 95 million years ago.
Split into simpler sentences: Several (9 or 10) oceanic plates were completely subducted and their remains has formed paired metamorphic belts. Most recent completely subducted plate was Izanagi Plate 95 million years ago.