Owen Green (Office 20.33 on L1) manages the Geofacilities laboratories. These comprise six separate laboratories situated on L1 and in the basement. Situated on L1 is the sedimentology/wet preparation area (20.37). Samples processed using acids and alkalis in the fume cupboards of the wet Chemistry Laboratory (20.36) and screening using 10 or 20cm diameter wet (stainless steel) or dry (brass) sieves or monofilament mesh (5-20um). Slide mounting can also be undertaken, and a Frantz Isodynamic magnetic separator is also available in the lab. Both heavy liquid and centrifuge separation can also be undertaken. Situated in the basement are the rock preparation laboratories. These comprise the Rock Crushing and Macro-fossil preparation (00.11) laboratory with a range of crushing, grinding and milling equipment. Mechanical (percussion and reciprocal) pneumatic and electrical hand tools. The Rock Cutting (00.12), Thin Section (00.15) and Polishing (00.14) laboratories contain a range of equipment for cutting, grinding lapping and single and diamond polishing. The Optics laboratory (00.05) contains high resolution (biological) and polarising (transmitted and incident illumination), and stereozoom imaging for prepared slides and specimen surface examination. Training is provided, and optics and rock crushing equipment must be pre-booked prior to use.