Abstract
Cretaceous amber plays a crucial role in understanding the evolution of Late Mesozoic biotas and changes in palaeoclimates and palaeoenvironments. This paper reports amber, insects and plant fossils from the Lower Cretaceous Jiufengshan Formation in Heihe City, Heilongjiang Province, Northeast China, and presents the Fourier-transform infrared (FT-IR) spectroscopic characteristics of the amber. The Heihe amber occurs predominantly as irregular blocky pieces and layered forms, and is mainly preserved in coal seams. In addition, insect fossils belonging to multiple groups, including Coleoptera, Orthoptera, Hemiptera, Blattodea and Trichoptera (caddis cases), have been found in black shales near the amber-bearing horizons, further enriching the palaeobiological assemblage of the region. This discovery provides important empirical evidence for investigating the biotic characteristics and stratigraphic correlation of northern China during the late Mesozoic.
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