Russian Trilobites

Product Age Product Age Amgan stage (1) Aseri Horizon (172) Botomian stage (0) Botomian stage (530 million year ago) (2) Carbiniferous (465 million year ago) (1) Eamsian Stage (10) Early Devon (407 to 398 million years ago) (10) Furongian Serie (8) Kukruse Horizon (16) Kukruse Stage (1) Kunda Horizon (66) Lasnamägi Horizon (8) Llandeilien (1) Lower Cambrian (2) Lower Ordovician (104) Lower Ordovician (465 million year ago) (1) Lower Ordovician (468 million year ago) (2) Lower Ordovician (480 million year ago) (20) Middle Cambrian (1) Middle Ordovician (119) Middle Ordovician (465 million year ago) (63) Ogon’or Formation (495-490 million year ago) (8) Tournaisian (1) Uhaku Horizon (0) Upper Cambrian (8) Upper Carboniferous (320 million year ago) (2) Upper Ordovician (0) Upper Ordovician (465 million year ago) (17) Volkhov Horizon (54) zone Asaphus expansus (468 million year ago) (43) zone Asaphus kowalewskii (9) zone Asaphus kowalewskii (465 million year ago) (94) zone Asaphus laevissimus (468 million year ago) (1) zone Asaphus lepidurus (480 million year ago) (57) zone Asaphus ornatus (468 million year ago) (1) zone Asaphus plautini (465 million year ago) (6) zone Asaphus punctatus (465 million year ago) (18) zone Asaphus sulevi-ingrianus (465 million year ago) (3) zone Asaphus sulevi-ingrianus (468 million year ago) (2)