Piper, D.P.; Rogers, P.J.. 1980 Procedure for the assessment of the conglomerate resources of the Sherwood Sandstone Group. London, UK, British Geological Survey, 17pp. (Mineral Assessment Report 56) (Unpublished)
Abstract
Field and laboratory studies to investigate the regional assessment of the conglomerate resources of the Sherwood Sandstone Group (formerly the Bunter Pebble Beds) are described and illustrated. They have included trials of air-flush hammer drilling, the evaluation of the grain-size distribution of comminuted bulk samples taken from boreholes against natural samples and down-the-hole photography. Limiting arbitrary physical criteria are proposed. The integration and presentation of geological and assessment data by means of a resource map and report are outlined.
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