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INTRODUCTION The author began his work in Shansi since 1919. The main aim of his work, as was the instruetiou of Dr. V K. Ting, director of The Geological Survey, was to survey a geological map on the scale of one to one million and examine the coal and iron resources which were known as exceptionally 相似文献
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The samples for microscopic study are all collected from the Hsitsocoal field situated about 50 li northwest of the Tzuhsieh city and 40 li east ofthe Matouchen station of Pinghan Railway.In order to understand the 相似文献
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The samples for microscopic study are all collected from the Hsitsocoal field situated about 50 li northwest of the Tzuhsieh city and 40 li east ofthe Matouchen station of Pinghan Railway.In order to understand the 相似文献
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The Western Hills of Peking are,since very remote times,well knownfor coal production and Mentoukou is one of the most productive districts amongthese hills.On account of its economic importance it was visited by several 相似文献
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The Western Hills of Peking are,since very remote times,well knownfor coal production and Mentoukou is one of the most productive districts amongthese hills.On account of its economic importance it was visited by several 相似文献
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The use of the heavy minerals in sedimentary rocks as a means for correlation of stratigraphic problem is becoming more and more widespread in recent years, especially in England and United States. Where the rock formations are scanty in fossils or can not be correlated by fossils alone, the study 相似文献
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中国地质调查工作始自1916年,虽已具有四十余年的历史,并绘制了全国三百万分之一地质图和编印了七次全国矿产纪要,但对于泥煤则甚少注意。 相似文献
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泥煤为第四纪重要矿产之一, 在社会主义大规模经济建设中, 占有相当的位置。 相似文献
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關於華北地文首作系統之研究者為維理士氏,維氏於一千九百零四年在河北山西一帶曾作較詳密之地質調查,結果乃將地文分為四期。最古者曰北台期,用以代表一準平原之老年地形,謂所有由褶曲而突起之山脈,至北台期之終,皆已消滅無存,其侵 相似文献