东亚古陆中生代晚期热河生物群的起源、发展、鼎盛与衰亡

本文探讨东亚古陆独特而著名的“热河生物群”的起源、发展、鼎盛与衰亡的规律;同时也提出其顶底的界限范围。总结和补充笔者于1983年首次提出的关于热河生物群起源于华北、以燕辽为中心,尔后向外扩散和迁移,形成独特的生物区系的观点。

ORIGIN,DEVELOPMENT, FLOURISH AND DISAPPEARANCE OF THE LATE MESOZOIC JEHOL BIOTA IN EASTERN ASIAN PALEOCONTINENT

The paleogeography of Late Jurassic, early and late stage of Early Cretaceous, includ- ing the divisions of paleogeographical districts and their volcanoclastic rocks and sedimen- tary district, paleomountains, marine sedimentary district. and their representatives of the stratigraphical units and various fossil assemblages, fauna, flora are described (Table ll). On the basis of above materials, the author suggested on the regularity of the origin, development, flourish, decline and disappearance of the famous and special Jehol (Rehe) biota in Eastern Asian Paleocontinent (EAP) and distribution of its spread and migration . and then proposed the top and the bottom boundary of Jehol biota at geological column. in 1983 the author reported that the Jehol biota originated from Northern China Pale- ocontinent (NCP ) and Northern Hebei--western Liaoning area (or called Yanliao area ) was its original center, then it spreaded and migrated to other places, including Mongolia, Sibiria and Eastern Transbaikalia and formed an unique Jehol biota, distributed at about longitude 90～130°and latitude 25～27°. In 1985, 1986, 1990 the author reported and discussed the original problem of Jehol biota. In 1990 Dr. Wang Si'en supported and quoted this view of above Jehol biota origin in his academic paper-- "Origin, evolution and mechanrsm of the Jehol fauna ". The original vlew of Jehol biota may help us to trace the origin, evolution, develop- ment and geological and geographical distributions of various fossils of Jehol biota in EAP.