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[lemma=thin] □
[lemma=layer] □
Even a ' thin layer ' ABM system could offer crucial protection from such threats . The primary ground-water source is the relatively thick permeable layer of silt , sand and gravel deposited beneath a thin layer of alluvial and gravely clay along the Ohio and Muskingum River valleys . I think the idea was to provide a thin layer of ground fog while the dancer was doing her thing , but instead a tremendous thick cloud cover erupted from stage right as soon as the music started , engulfing the stage and the audience and lingering for 5 - 10 minutes after the machine was turned off . In some areas of the county , thin layers of sand and gravel , inter-bedded in thick layers of clay , lie above the limestone bedrock . " The Penn State researcher exposed flat glass surfaces ( silica dioxide ) coated with thin layers of silicon dioxide , titanium dioxide or tin dioxide to eight different strains of bacteria , including some disease-causing types , and two different wavelengths of UV light . Other dynamic phenomena of significant importance is the elastic and viscoelastic behaviour of thin layered solids such as coatings , when subjected to cyclic or other form of oscillatory loads . Limited signal bandwidth and abundant thin layering interact to produce tuned seismic reflections with peaks , troughs and zero-crossings that rarely follow true geologic boundaries . At Rensselaer , Ishwara Bhat , associate professor of electrical , computer , and systems engineering , uses a process known as organo metallic vapor phase epitaxy to create thin layers of compounds such as gallium indium antimonide . A cross section of the gorge reveals - from top to bottom - thin layers of glacial outwash and Oneota dolomite ( Ordovician ) , a massive layer of Jordan sandstone ( Cambrian ) , Lodi shale ( Cambrian ) , Nicollet Creek dolomite ( Cambrian ) , and Franconia sandstone ( Cambrian ) . Area F illustrates parts of the county where thin layers of water-bearing sand and gravel may be encountered at depths of 25 to more than 150 feet . The ground plane of a microchannel plate is coated with a thin layer of aluminum oxide that does not cover its pores , so its performance is not affected .