sedimentology

A Practical Guide to Glacial Sediments, 2nd edition

The first edition of “A Practical Guide to the study of Glacial Sediments” (Edited by David Evans and Doug Benn) was an essential handbook to all students of glacial geology. It has helped countless undergraduate and MSc dissertation students, and my well-thumbed copy has come with me every time I go into the field. It …

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Glacial erratics

What is a glacial erratic? Glacial erratics, often simply called erratics, or erratic boulders, are rocks that have been transported by ice and deposited elsewhere. The type of rock (lithology) that the glacial erratic is made from is different to the lithology of the bedrock where the erratic is deposited. For example, an erratic could …

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Glacial Sedimentology

Other techniques that are well used in glaciology include remote sensing of glacier change. We can map the world’s glaciers using satellite imagery, including taking inventories of glaciers, and map glacier recession from space. We can then use satellite imagery to observe glaciers receding around the Antarctic Peninsula, and in Patagonia.

Interpretation of Glacigenic Sediments

This section is taken from Bethan Davies’ PhD thesis. Multiproxy analysis of glacigenic sediments? | Micromorphological interpretation of glacigenic sediments | References | Comments | Multiproxy analysis of glacigenic sediments Lodgement and Deformation tills Thin-section analysis can be used in conjunction with macroscale sedimentological analysis to identify subglacial processes. Traditionally, tills have been subdivided based …

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Thin-section analysis

This section is taken from Bethan Davies’ PhD thesis. Introduction to micromorphology | Sample Collection and Preparation | Sample analysis | References | Comments | Introduction to micromorphology Micromorphology, or thin-section analysis, is the microscopic examination of the composition and structure of sediments. It was originally developed in soil science, with concepts of plasmic fabric …

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Clast Shape, Till Fabrics and Striae

This section is taken from Bethan Davies’ PhD thesis. Clast Angularity-Roundness | Clast Macro-Fabric Analysis | Striae Orientation | References | Comments | Clast Angularity-Roundness Clasts inherit their shapes from the surrounding environment; erosion, transportation and weathering give clasts distinctive geomorphological signatures1. Angularity-roundness is simple to measure in the field when undertaking till-fabric analysis. Descriptive …

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Lithostratigraphy

This section is taken from Bethan Davies’ PhD thesis. What is Lithostratigraphy? | Vertical Profiles | Lithofacies Associations | Landsystems | References | Comments | What is Lithostratigraphy? Lithostratigraphy is the ‘classification of bodies of rock based on the observable lithological properties of the strata and their relative stratigraphic positions’1. Stratigraphy includes information about processes, …

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