none 10.1144/GSL.SP.1987.029.01.06 Geological Society of London Geological Society of London 1881 32629758 65091 2024072306090200517 10.1144 2024-07-23T20:30:09Z 2008-04-30T18:09:42Z 14 Geological Society, London, Special Publications SP 0305-8719 2041-4927 05 16 2007 01 1987 29 1 R. J. Allison Department of Geography, King’s College London Strand, London WC2R 2LS Present address: Department of Geography, University of Durham South Road, Durham DH1 3LE Summary The Grindosonic apparatus, new equipment capable of indirectly determining rock compressive strength, is discussed. This utilizes the principle that elasticity theory can be applied to rock masses (Attewell & Farmer 1976; Selby 1982) and directly measures the fundamental vibration frequency of a rock sample of regular dimensions following shock excitation. Dynamic Young’s modulus and a variety of other parameters can be established. Samples of Upper Cretaceous Chalk and Upper Jurassic Portland Limestone are used to demonstrate the apparatus and its application. Test specimens were prepared and analysis conducted on material extracted at a number of locations throughout the Isle of Purbeck in Dorset, UK. Samples suitable for deformation in triaxial compression were also prepared and correlations drawn between compressive strength, dynamic Young’s modulus, porosity and density. 01 1987 01 1987 63 69 10.1144/GSL.SP.1987.029.01.06 https://doi.org/10.15223/policy-002 10.1144/GSL.SP.1987.029.01.06 https://www.lyellcollection.org/doi/10.1144/GSL.SP.1987.029.01.06 https://www.lyellcollection.org/doi/pdf/10.1144/GSL.SP.1987.029.01.06 http://ebooks.geoscienceworld.org/lookup/doi/10.1144/GSL.SP.1987.029.01.06 The Geology of the Country around Weymouth, Swanage, Corfe and Lulworth Arkell W. J. 386 1947 Arkell W. J. The Geology of the Country around Weymouth, Swanage, Corfe and Lulworth 1947 London HMSO 386 Principles of Engineering Geology Attewell P. B. 1045 1976 10.1007/978-94-009-5707-7 Attewell P. B., Farmer I. W. Principles of Engineering Geology 1976 London Chapman & Hall 1045 Rock Characterisation, Testing and Monitoring Brown E. T. 211 1981 Brown E. T. Rock Characterisation, Testing and Monitoring 1981 Oxford Pergamon Press 211 10.1680/geot.1977.27.3.435 Proc. Dorset nat. Hist. archaeol. Soc. Jones M. E. 107 105 1983 Jones M. E., Allison R. J., Gilligan J. On the relationships between geology and coastal landforms in central southern England 1983 105 Proc. Dorset nat. Hist. archaeol. Soc. 107 118 British Regional Geology, the Hampshire Basin and Adjoining Areas Melville R. V. 146 1982 Melville R. V., Freshney E. C. British Regional Geology, the Hampshire Basin and Adjoining Areas 1982 London HMSO 146 Properties of Concrete Neville A. M. 779 1981 Neville A. M. Properties of Concrete 1981 London Pitman 779 10.1144/gsjgs.139.3.0249 Hillslope Form and Process Selby M. J. 264 1982 Selby M. J. Hillslope Form and Process 1982 New York Oxford University Press 264 10.1144/gsjgs.139.4.0543