article: Jehol Biota
links: Sinosauropteryx Lower Cretaceous Sinodelphys Liaoning Radiometric dating Mesozoic Jeholornis North Korea Lagerstatte Japan Jurassic Middle Jurassic Volcanic ash Manchuria Angiosperm Scavenger K–Ar dating Palaeontologist Upper Jurassic Confuciusornis Archaefructus Microraptor Upper Cretaceous China Ocean