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The Katarchean
The oldest (older than 3500 m.y.) supracrustals and plutonic rocks building up the basement of all of the remaining geologic formations belong to the...
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The Mesoprotozoic
To the Mesoprotozoic are attributed the supracrustals and plutonic rocks that were formed after the Kenoran diastrophism or at the end of it (the...
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Apparent polar wander paths carboniferous through cenozoic and the assembly of Gondwana
Directions of magnetization observed from rock-units from a given continental block are conveniently summarized by a path of apparent polar wander...
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The Intracratonic Karoo Basin
A broad spectrum of paleoenvironments ranging from glacial through coarse bedload and mixed-load streams, deltaic, beach, proximal terrigenous shelf,...
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Correlation between magnetic and mineralogical properties of some tertiary basaltic rocks from qatrani-fayum area, Egypt
This paper reports clear correlation between the magnetic and mineralogical properties of some basaltic rocks from Egypt. Although all the measured...
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Intercontinental structural ties and mobilistic reconstructions
The authors discuss the geological data contradicting basic mobilistic reconstructions of the positions of continents in the past. Analysis is given...
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The geochemical distribution and source of copper in the metalliferous mining region of Southwest England
In order to test a hypothesis on the origin of copper in the Cornwall district, 270 samples of mafic rocks, 88 samples of sedimentary rocks and 78...
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Evolving Concepts on the Nature and the Ecological Significance of Stromatolites
The German authors used to call “Mumien” ovoid to cylindrical, finely laminated, calcareous nodules resulting from periodical algal encrustations...
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Rifts, evaporites and the origin of certain alkaline rocks
The assimilation of evaporites and brines by basaltic magma in continental rifts may be responsible for alkaline magmatism and metasomatism. Spilites...
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Atlantic-Type Continental Margins
Continental margins can be characterized as of “Atlantic” or “Pacific” type, essentially depending on whether they have experienced a relatively long...
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Metallogenic provinces in South America
This paper discusses the broadscale distribution of some ore deposit types in South America, trying to discern possible relations with major...
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Primary Magmas
We must recognize the fact that huge masses of acidic rocks cannot be separated directly from basic melts. Their appearance requires special...
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Ore Accumulations of Al-Fe-Mn, Their Genesis and Distribution in Humid Zones
Three points are of critical importance in the genetic analysis of ore accumulations in humid belts: (a) the facies conditions under which Al, Fe,...
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Die Verteilung der Lanthaniden in basaltischen Gesteinen
Several types of basaltic and related rocks from NW Germany have been analysed for 14 lanthanides and yttrium. Alkali olivine basalts (13 samples)...
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Flood traps through space and time and their bearing on some problems of geotectonics
A study of world stratigraphy reveals, somewhat unexpectedly, that there were extensive basalt flows in the early Precambrian, but the Upper...
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The Extrageosynclinal Type of Magmatic Development
Judging from the present, magmas do not appear under conditions of tectonic calm. Any appearance of modern magmatism or magmatism of the recent...