Geochemistry of the Late Permian Coal in Northeast Yunnan, China: Provenance and Paleoenvironmental Implications.

ACS Omega · 2025 · PMC12199012 · PMID 40584334

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an overall trendno p-value reported

During the coal-forming period, frequent seawater incursions and alternating wet–dry climatic conditions occurred, with an overall trend transitioning from humid to arid.

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