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陜西漢中天坑群首次發(fā)現大量古生物化石

2020-05-13 07:00來(lái)源：深圳新聞網(wǎng)

圖為2019年3月11日，陜西漢中鎮巴縣三元鎮天坑，坑口形態(tài)呈近圓形，最大口徑110米，最大坑深150米。

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[責任編輯：馬靜欣]

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