Haifanggou Formation, Geological formation near Daohugou village, Inner Mongolia, China
Haifanggou Formation is a geological structure near Daohugou village in Inner Mongolia made up of different rock types stacked in layers. The site shows conglomerate, sandstone, mudstone, and coal deposits arranged through time.
This formation took shape during the middle to late Jurassic period, roughly 165 to 160 million years ago. Scientists confirmed the timing through tests on zircon minerals that revealed when the rocks formed.
The formation attracts researchers because it holds fossils of thousands of insects that reveal how different species lived ages ago. You can observe the variety of ancient life preserved in its rock layers.
The site is located at coordinates 41.8 degrees north latitude and 120.8 degrees east longitude near Daohugou village. Access is mainly for researchers and those interested in studying the fossil-bearing rock layers.
The formation holds the oldest known redwood tree fossil called Sequoia jeholensis along with numerous remains of salamanders and pterosaurs. This mix of plant and animal fossils makes it a rare window into Jurassic-era life.
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