argillaceous Applied to rocks which are silt- to clay-sized sediments (grain size less than 0.0625 mm in diameter). They account for more than 50% of sedimentary rocks and most have a very high clay mineral content. Many contain a high percentage of organic material and can be regarded as potential source rocks for hydrocarbons.

argillaceous Applied to rocks which are silt to clay-sized sediments with grains less than 0.0625 mm in diameter. They account for more than 50 per cent of sedimentary rocks and most have a very high clay mineral content. Many contain a high percentage of organic material and can be regarded as potential source rocks for hydrocarbons.

argillaceous Applied to rocks that are silt- or clay-sized sediments with grains less than 0.0625 mm in diameter. They account for more than 50 per cent of sedimentary rocks and most have a very high clay mineral content. Many contain a high percentage of organic material and can be regarded as potential source rocks for hydrocarbons.