Guanling Formation, Geological formation in Guizhou and Yunnan, China
The Guanling Formation is a geological layering in southwestern China spanning Guizhou and Yunnan provinces, composed of mudstone and limestone. The rocks reveal how coastal and marine environments existed in this region millions of years ago.
This layering formed during the Middle Triassic when seas and coastal areas covered what is now southwestern China. The deposits preserve an extensive fossil record of these ancient environments.
Scientists from multiple countries conduct research at the Guanling Formation, contributing to the understanding of marine reptile evolution and ancient ecosystems.
The formation is accessible at several locations across the mountainous regions of these provinces and reveals ancient marine deposits. Visitors should prepare for uneven terrain and variable weather conditions at higher elevations.
Certain volcanic ash layers within this formation were precisely dated using advanced laboratory methods and provide rare time markers for the Triassic period. These exact age measurements help scientists better understand the rapid changes in marine life during that time.
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