Author: H. Papunen
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 101

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Author:
Publisher:
ISBN: 9789516901216
Category :
Languages : en
Pages :

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Author: Jaakko Siivola
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 148

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Author:
Publisher:
ISBN:
Category : Copper ores
Languages : en
Pages : 410

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Author: Aimo Kustaa Mikkola
Publisher:
ISBN:
Category : Metallogeny
Languages : en
Pages : 28

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Book Description

Author: P. E. Brown
Publisher: Geological Society of America
ISBN: 0813722721
Category : Science
Languages : en
Pages : 520

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Author: International Geological Correlation Programme
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 386

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Book Description

Author: L.J. Salop
Publisher: Springer Science & Business Media
ISBN: 3642686842
Category : Science
Languages : en
Pages : 471

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Book Description
Progress in Precambrian geology has been exceptionally great, indeed quite striking for geologists of the older generation; only some 30-40 years ago the Precambrian appeared as an uncertain and even mystic prelude to geologic evolution. Even the very name - Precambrian - means some indi visible unit in the early history of the Earth, the beginning of which is poorly known. At the same time it was obvious that the Precambrian formations are of extremely varied and complex composition and poor knowledge and lack of reliable methods of division and correlation were to blame for the lack of significant progress in studies of this early evolutionary stage of the planet. Certainly, even at the very start of Precambrian studies, the results obtained were quite promising, lifting as they did the mysterious veil over the regional Precambrian; but they presented no general realistic picture of this early stage in the Earth's evolution at that time. Recently, this situation has completely changed, due to new methods of study of the older forma tions, and due also to the refinement of some well-known methods, in particular of division, dating, and correlation of "silent" metamorphic strata. Application of different isotope methods of dating was most impor tant in providing objective rock age and thereby the age of geologic events recorded in these rocks. Thus it became possible to reconstruct the oldest geologic period of our planet.

Author: P. J. Cook
Publisher: Cambridge University Press
ISBN: 9780521619219
Category : Nature
Languages : en
Pages : 412

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Book Description
This book is an important contribution to the scientific understanding of phosphate deposits.

Author: D.R. Hunter
Publisher: Elsevier
ISBN: 0080869017
Category : Science
Languages : en
Pages : 890

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Book Description
Precambrian of the Southern Hemisphere