cover

With contributions by E. Seibertz, I. Valeton, E.E. Kohler:

Correlation of Stratigraphic Methods, Part I.

1983. 161 pages, 27 figures, 34 tables, 5 plates, 17x24cm, 420 g
Language: English

(Geologisches Jahrbuch Reihe D, Band D 52)

ISBN 978-3-510-96140-5, paperback, price: 28.00 €

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Contents

Contents top ↑


1. Introduction 7
2. Stratigraphy and Paleogeography 8
2.1. Early Cretaceous 9
2.2. Late Cretaceous 12
3. Petrology of the Pellet-Bearing Rocks 12
3.1. Grain-size of the Detrital Components 20
3.2. Mineral Composition 20
3.3. Texture of the Sediments 23
4. Physical Properties of the Glauconite Pellets 23
4.1. General Conditions 23
4.2. Morphology and Grain-size 24
4.3. Internal Texture and Surface Features 25
4.4. Density and Colour 26
4.5. X-ray Crystallinity 26
5. Chemical Properties of the Glauconite Pellets 32
5.1. General Conditions 32
5.2. Mineral Inclusions in the Pellets 32
5.3. Cation Exchange Capacity 32
5.4. Chemical Analyses of the Main Elements 36
5.5. Trace Elements in the Pellets 51
5.6. Calculation of the Structural Formulas 51
6. Genesis and Geochemical Provinces of Glauconite Pellets 66
6.1. Source Material and Environmental Conditions during Diagenesis 66
6.2. Mechanism of Pellet Formation from a Gel-like Material 68
6.3. Criteria for Autochthony, Parautochthony or Allochthony
of the Pellets 68
6.4. Late Diagenetic Transformation and Epigenetic Alteration 70
7. Radiometric Dating on Glauconite Pellets in the Cretaceous 70
8. Discussion of the Results 72
9. Techniques of Sample Preparation and Analyses 73
10. References 74