Lamination (geology)
Thin layers present in sedimentary rock / From Wikipedia, the free encyclopedia
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In geology, lamination (from Latin lāmina 'thin layer') is a small-scale sequence of fine layers (pl.: laminae; sg.: lamina) that occurs in sedimentary rocks. Laminae are normally smaller and less pronounced than bedding. Lamination is often regarded as planar structures one centimetre or less in thickness, whereas bedding layers are greater than one centimetre.[1] However, structures from several millimetres to many centimetres have been described as laminae.[2] A single sedimentary rock can have both laminae and beds.