Rhétien Jurassic Period 瑞替期 Рет Rhaet Rhaet older bound -208.5 Ma Late Triassic Epoch Triassic Period rhaeti Reciano Mesozoic Era rät younger bound -201.3 +|-0.2 Ma Rhaetian Age Geologic Time Scale (2018) Retyk Base of Rhaetian retij Rhaeti レーティアン期 Ræt retico Rhetiense Retis Norian Age Rhaetien Base of Jurassic rét Rhätium Early Jurassic Epoch Hettangian Age Rhaetian Rhaetiën a1.1.2.3.1.1 Phanerozoic Eon