The flourishing of the JeholBiota is related to the unique, warm, fresh water and continental environment of East Asia in the Early Cretaceous.
热 河生物群的繁盛和东亚地区当时特有的温暖的淡 水和陆地 环境具有密切的联系。
2
The study of the JeholBiota has a long way to go, while the scientific administration and protection of the fossil sites remains a pressing issue.
热河生物群的研究还具有很大的潜力，而对化石的科学发掘和保护的任务还十分艰巨。
3
Excavation and trace element analysis indicates: Jeholbiota experienced mass mortality and rapid burial; toxic gases of the volcanic activities are the main factors of biological catastrophic event.