Observatiens On the Siderite Deposits Of Shansi

DISCOVERY.The siderite deposit or clay ironstone was discovered bythe senior writer at Chintsui~1(Fig.1)and 30 kilometers north of Antsehcity~2 in southern Shansi.The siderite nodules are embedded in greenishlimy clay beds lying above the Carboniferous limestone and underneaththe Permo-Carboniferous red and green sandstones.In this locality only     

On some examples of River Capture

In the course of stream development, each stream and its tributaries tend toincrease their length by headward erosion, or in other words to enlarge their catchment area. A shifting of divide and eventually a struggle for existence by which a part or the whole of tne stream will be diverted or captured by the otherwill be resulted. This phenomena is called in physiography, river capture or river piracy.     

THE LATE CENOZOIC FORMATIONS OF S.E.SHANSI

Up to 1931 nothing was positively known concerning the Cenozoicformations eventually preserved in S.E.Shansi.The large area bounded by     

THE LATE CENOZOIC FORMATIONS OF S.E.SHANSI

Up to 1931 nothing was positively known concerning the Cenozoicformations eventually preserved in S.E.Shansi.The large area bounded by     

ON LOPINITE,A NEW TYPE OF COAL IN CHINA

To the east of Nanchang,the capital of Kiangsi Province,there cropsout a continuous belt of Permian coal series~1 trending approximately in thedirection from N.E.to S.W.Broadly speaking,this coal belt forms a synclinal     

A COMPREHENSIVE STUDY OF MUD CRACKS AND OTHER SIMILAR STRUCTURES

In text-books of geology and in most papers dealing with geologicstructures, mud cracks seem to have been regarded as merely one kindof structures developed only in soft sediments, such as muds or clays. Itseems also that the studies of mud-crack structure have been mostly     

Theoretical wind wave frequency spectra in deep water——Ⅱ. Comparison and verification of spectra

In this part of the present paper the theoretical spectra derived in Part I are compared with the JONSWAP spectrum and field data, the agreement being encouraging.     

过去70 Ma中冰岛岩浆羽的脉动-来自幕式海山火山的证据

我们为了明确Rockall海槽中海山的成因，于1998年夏季在海山翼部进行了拖网取样。在Anton Dohrn 海山周围5个不同地点拖取的岩样中发现了4个不同时期的火山幕（即70±1 Ma，62±1 Ma, 47±1 Ma和41±1 Ma）。据我们所知，这是第一次得到的北大西洋火山区晚白垩世岩浆活动的可靠的岩石年代证据，与Anton Dohrn海山东翼和Rosemary海岸海山顶部的白垩纪化石年代相一致。在Hebrides阶地海山拖取的岩样的年代指出了3个火山期，即62±1 Ma，51±1 Ma和48±1 Ma。 Anton Dohrn海山也发生过其中的第一和第三幕，而在Rosemary海岸海山西北翼取…     

160Ma海洋沉积磷埋藏记录：温室和冰室条件下气候与大陆风化的耦合关系

１６０Ｍａ海洋沉积磷埋藏记录：温室和冰室条件下气候与大陆风化的耦合关系Ｂ．Ｆ．Ｋａｒｌ大陆风化作用尽管有不同的因果关系，但与气候和大地构造作用有内在联系．大陆风化速率的主要控制因素为与气候变化有关的象温度、降水量和冰）１１作用以及如地形形态等的大地构...