海相礫石 的英文怎麼說
中文拼音 [hǎixiānglìdàn]
海相礫石
英文
marine gravel-
The main sedimentary facies of the upper carboniferous on the margin of the xuefeng anicient land can be divided into submarine alluvial, foreshore siliciclastic, shallow beach carbonate, carbonate platform and backshore restrict carbonate facies
摘要湖南沅陵雪峰古陸邊緣上石炭統主要包括下列巖相類型：沖積扇砂礫巖相、前濱海灘砂巖相、淺灘碳酸鹽相及混積巖相、潮下碳酸鹽巖相及灘后局限碳酸鹽巖相。Gravel-size material, except for broken shells which are quickly worn down, is rarely available on low shores.
相當于礫石級的物質，除了迅速被磨細的貝殼碎片外，是極少見于低位海濱上的。The result corrected by former result was to judge the land to be suitable for cultivation or not. in the end, productivity index threshold under different suitable - levels was determined by analyzing the frequency histograms distribution of 4 productivity index. the result shows that the productivity index criteria of reserved land in beijing is that altitude 800 m, slope 15, soil depth 30 cm and gravel content 15 %
在生產性指標方面，以北京市土地開發復墾潛力調查評價為基礎，運用相關分析、主成分分析確定指標為海拔、坡度、土層厚度和礫石含量；對指標進行聚類，根據聚類結果對原有評價結果進行修正並判定后備土地資源的宜耕性；通過分析多因素綜合作用下四項指標的頻率分佈情況，確定上述四個生產性指標在不同宜耕等級下的閾值。
分享友人