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本篇分为三节:第一节论研究(竹廷)蜗之方法及其各部分之名称;并猎取古生物学家迄今历史之结果而加以批评。第二节专述中国北部已发见之(竹廷)蜗。第三节讨论本篇所述各种(竹廷)蜗生存之时代及其棲息流徙之情形。 相似文献
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正2018年第1期期刊登了第三节矿区勘查阶段及其评价的第一部分预查矿区评价中的1.1~1.4小节及1.5小节的前半部分,本期刊登1.5小节的后半部分及其后的4个小节(1.6~1.9)。下期将刊登第三节的第二部分普查矿区评价。第三节矿区勘查阶段及其评价1预查矿区评价1.5磁异常的工作与评价(4)不同磁异常区应分别对待在磁异常检查中经常会出现2种情况:一种是磁异常范围内有地质体出露,甚至出露还相当完好;另一 相似文献
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Prof. R. H. Rastall, (1) in his book "The Geology of the Metalliferous Deposits", makes this significant remark: "Besides their definite distribution in time, igneous activity and the accompanying mineralization must also be considered from the geographical point of view, not alone in con- 相似文献
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正上期刊登了第三节矿区勘查阶段及其评价的第二部分普查矿区评价的前6个小节,本期刊登其后的7个小节。第三节矿区勘查阶段及其评价2普查矿区评价2.7综合评价中需要探索的问题上述(2.3~2.6节)是地质与物探相结合进行普查评价的较典型例子。当时全国还有不少相似的实例,有的成功或很成功;有的不成功。现在回过头来看,在技术层面上出现的问题对我们今后矿区普查评价工作仍有 相似文献
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《冰川冻土》1984,(4)
No.1 Studies of Ice Formatiom and Ice Fabric 0n the Law Dome,Antarctica…………………Xie Zichu(22)Analysis of Mieropartieles in Ice Cores:An Indicator of Past Environments………………………... ……………………-’…………………………………………………………………-Lonnie G.Thempson(32)Creep Behavior of Frozen Silt under Constant Uniaxial Stress..…..…….………….………………… ………………………………………………………………………………Z^“Yannfin and D。L.Carbee(48)Preliminary Stu… 相似文献
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LONG TERM HISTORY (DEXTRAL TO SINISTRAL AND DUCTILE TO BRITTLE) OF THE DAMXUNG—JIALI SHEAR ZONE IN SOUTHERN TIBET 相似文献
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《Scientia Geologica Sinica》2001,(4)
1. Introduction A central goal of stratigraphic studies of foreland basins is to discern which of the possible controls is responsible for vertical trends. In many cases, the primary interest has been to determine the time of deformation in the mountain belt from strata in the foreland basin (Jordan et al., 1988). Traditionally, an active tectonic phase was presumed to cause high relief, and then an immediate flux of coarse sediment into the basin, which produced conglomerates (Longwell, 193… 相似文献
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INTRODUCTION. I was appointed to accompany Dr. J. G. Andersson to take a trip incentral Shantung. especially in Men Yin (蒙阴) and Lai Wu (莱芜),valleys,for the purpose of collecting fossils and observing the post-Palaeozoic forma-tions. We came back to Peking in December, 1922. The conclusion 相似文献
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INTRODUCTION. I was appointed to accompany Dr. J. G. Andersson to take a trip incentral Shantung. especially in Men Yin (蒙阴) and Lai Wu (莱芜),valleys,for the purpose of collecting fossils and observing the post-Palaeozoic forma-tions. We came back to Peking in December, 1922. The conclusion 相似文献
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《地学前缘》2006,(2)
(1)Dr .El-Sayed Mohamed Abdelrahman Professor of Geophysics ,Cairo University ,Egypt . His pri mary researchinterests are poten-tial field methods . His research has focused on gravity , magnetic ,self-potential methods including depth and shape determination . He hasbeen awarded 5 prizes between 1992 and 2003 ,including the state prize in Earth sciences ,the state prize in advanced technological sciencesand the others . (2)Dr . Norman Bleistein Emeritus Professor of Geophysics ,Colorad… 相似文献
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A. W. GRABAU 《地质学报》1927,6(2):155-198
INTRODUCTION Since the publication of Dr. J. G. Andersson's important "Essays onthe Cenozoic of Northern China" in 1923 much material has accumulated, partlyas the result of the explorations by the Geological Survey of China and partlythrough the expeditions sent out by other institutions, especial1y the Central 相似文献