Sedimentary Rocks in the Field: A Practical Guide, 4th Edition

Acknowledgements.

1 Introduction.

1.1 Tools of the Trade.

1.2 Other Tools for the Field.

1.3 Use of GPS (Global Positioning System) in Sedimentary Studies.

1.4 Safety in the Field and General Guidance for Fieldwork.

2 Field Techniques.

2.1 What to Look For.

2.2 The Approach.

2.3 Field Notes.

2.4 Graphic Logs.

2.5 The Logging of Cores.

2.6 Lithofacies Codes.

2.7 Collecting Specimens.

2.8 Presentation of Results.

2.9 The Way-Up of Sedimentary Strata.

2.10 Stratigraphic Practice.

3 Sedimentary Rock Types.

3.1 Principal Lithological Groups.

3.2 Sandstones.

3.3 Conglomerates and Breccias.

3.4 Mudrocks.

3.5 Limestones.

3.6 Evaporites.

3.7 Ironstones.

3.8 Cherts.

3.9 Phosphate Deposits (Phosphorites).

3.10 Organic-Rich Deposits.

3.11 Volcaniclastic Deposits.

4 Sedimentary Rock Texture.

4.1 Introduction.

4.2 Sediment Grain-Size and Sorting.

4.3 Grain Morphology.

4.4 Sediment Fabric.

4.5 Textural Maturity.

4.6 Texture of Conglomerates and Breccias.

4.7 Induration and Degree of Weathering.

4.8 Colour of Sedimentary Rocks.

5 Sedimentary Structures and Geometry of Sedimentary Deposits.

5.1 Introduction.

5.2 Erosional Structures.

5.3 Depositional Structures.

5.4 Depositional Structures of Limestones (Including Dolomites).

5.5 Post-Depositional Sedimentary Structures.

5.6 Biogenic Sedimentary Structures.

5.7 The Geometry of Sedimentary Deposits and Lateral Facies Changes.

6 Fossils in the Field.

6.1 Introduction.

6.2 Fossil Distribution and Occurrence.

6.3 Fossil Associations and Diversity.

6.4 Skeletal Preservation (Taphonomy) and Diagenesis.

7 Palaeocurrent Analysis.

7.1 Introduction.

7.2 Palaeocurrent Measurements.

7.3 Structures for Palaeocurrent Measurement.

7.4 Presentation of Results and Calculation of Vector Means.

7.5 Interpretation of the Palaeocurrent Pattern.

8 What Next? Facies Identification and Sequence Analysis.

8.1 Introduction.

8.2 Facies Analysis.

8.3 Facies, Facies Models and Depositional Environments.

8.4 Cycle Stratigraphy and Sequence Stratigraphy.

Recommended Reading.

Index.