carboniferous carboniferous period
The hills are largely carboniferous limestone, which is quarried at several sites.
从多处遗址的挖掘来看, 这片丘陵大部分属石炭纪石灰岩。
—— 给力词典精选In Early Carboniferous, Tianshan mountains entered an intraplate evolution stage.
从石炭纪开始天山地区进入陆内演化阶段。
—— 给力词典精选WHERE HAINAN ISLAND IS IN CARBONIFEROUS - PERMIAN PERIOD?
石炭纪二叠纪的海南岛何在?
—— 给力词典精选The Weining age of Carboniferous period in Tongling area is a transgressive one.
铜陵地区石炭纪威宁期存在潮坪相、泻湖相和浅海陆棚相。
—— 给力词典精选The metamorphic ages of the eclogites are largely 320~220 Ma ( Carboniferous period to Triassic period ).
榴辉岩的变质年龄集中在320~220Ma ( 石炭纪-三叠纪 ) 之间。
—— 给力词典精选