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About this product
- DescriptionChalk has proved to be one of the more difficult rocks to corelog as it breaks up readily during the drilling process leading to core-loss and destructuring, particularly where flints, dular chalks, and/or fractures are present. One of the greatest difficulties is the identification of chalk engineering grade which relies heavily on fracture aperture. Obtaining the correct grade to define the depth of weathering and the depth at which fractures become closed is essential whether for tunnels in London or wind turbine piled foundations in the offshore chalks. Very few geologists and engineers have had the opportunity to study field sections in the chalk so there is little visual appreciation of the grades or the variation to expect or even what flint bands look like. To partly overcome this difficulty, both field and core sections are illustrated in this book. Equally important to recognizing chalk grade is the building of conceptual ground models for construction projects. This can only be achieved if the various chalk formations, beds, and marker beds can be identified from cores and then boreholes correlated using the marker beds. The chalk stratigraphy is accordingly covered with key formations and marker beds illustrated, and the best field sections for viewing them identified. This book is based on the standard lithostratigraphy and method of engineering description of chalk developed over many years. Also important are over 3,000 onshore and offshore chalk-cored boreholes undertaken by the author over more than 30 years. In addition, typical lithologies and weathering profiles representing the chalk formations likely to be encountered in the various onshore and offshore construction projects are illustrated using both field exposures, rotary core samples, and geophysical borehole wire-line logs. There are geological settings where information on the chalk is poor and unexpected lithologies and stratigraphies may be found. This book will enable geologists to work from first principles to construct a lithostratigraphy and define weathering boundaries.
- Author BiographyRory N. Mortimore is emeritus professor of engineering geology, University of Brighton, UK; visiting professor of engineering geology, University of Leeds, UK; and director, ChalkRock Limited, Lewes, Sussex, UK.
- Author(s)Rory N. Mortimore
- PublisherApple Academic Press Inc.
- Date of Publication13/10/2014
- SubjectCivil Engineering & Environmental Engineering
- Place of PublicationOakville
- Country of PublicationCanada
- ImprintApple Academic Press Inc.
- Content Noteillustrations
- Weight1542 g
- Width152 mm
- Height229 mm
- Spine25 mm
- Format DetailsUnsewn / adhesive bound
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