NeoproterozoicEarth-life systemNeoproterozoic oxygenation eventCryogenian glaciationEdiacaran animalEDIACARAN DOUSHANTUO FORMATIONVASE-SHAPED MICROFOSSILSURANIUM ISOTOPE EVIDENCESOUTH CHINAOCEAN OXYGENATIONIRON-FORMATIONCAP CARBONATEACANTHOMORPHIC ACRITARCHSFERRUGINOUS CONDITIONSGLACIAL DIAMICTITE