daredevil
发表于 2025-3-28 17:23:42
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白杨
发表于 2025-3-28 21:15:40
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interrupt
发表于 2025-3-28 23:04:28
https://doi.org/10.1007/978-3-8349-9079-2nd Silurian formations are exposed in outcrops or near the surface and form cover-collapse sinkholes, short network-type caves, sinuous conduits, and small karst springs. Some of the caves and conduits were created and mineralized by Mississippian-type ore-forming solutions during the Permian Period