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Among the Mesozoic formations the most developed and widespread in China, especially in northern China, is a great series which contains various rocks of volcanic origin, with or without sedimentary beds and igneous intru- 相似文献
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民國十九年秋,隨同吾師丁在君先生赴西南調查地質,經三峽,至奉節,見長江北岸有採鹽坑井,鹽井所在,爲三叠紀棕紫色砂岩層,在輪船上搖望,井似不深;其時在君先生即囑余注意四川自流井鹽礦成因,並指岸上鹽井所在地位,以所取鹽水當出 相似文献
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