Lithology

Stratigraphy as seen in southeastern Utah

The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples, or with low magnification microscopy. Physical characteristics include colour, texture, grain size, and composition.^[1]^[2]^[3] Lithology may refer to either a detailed description of these characteristics, or a summary of the gross physical character of a rock. Examples of lithologies in the second sense include sandstone, slate, basalt, or limestone.^[4]

Lithology is the basis of subdividing rock sequences into individual lithostratigraphic units for the purposes of mapping and correlation between areas. In certain applications, such as site investigations, lithology is described using a standard terminology such as in the European geotechnical standard Eurocode 7.

^ "Lithology". Earthquake Glossary. US Geological Survey. Retrieved 29 October 2010.
^ Bates, R. J.; Jackson, J. A., eds. (1984). Dictionary of Geological Terms (3 ed.). American Geological Institute. p. 299. ISBN 0-385-18101-9.
^ Allaby, Ailsa; Allaby, Michael (1999). Oxford Dictionary of Earth Sciences (2 ed.). Oxford University Press. p. 320. ISBN 0-19-280079-5.
^ American Heritage Dictionary, ed. (2005). The American heritage science dictionary. Houghton Mifflin Harcourt. p. 364. ISBN 978-0-618-45504-1.

[1] "Lithology". Earthquake Glossary. US Geological Survey. Retrieved 29 October 2010.

[AGI_dict_lithology-2] Bates, R. J.; Jackson, J. A., eds. (1984). Dictionary of Geological Terms (3 ed.). American Geological Institute. p. 299. ISBN 0-385-18101-9.

[Oxford_dict_lithology-3] Allaby, Ailsa; Allaby, Michael (1999). Oxford Dictionary of Earth Sciences (2 ed.). Oxford University Press. p. 320. ISBN 0-19-280079-5.

[heritage-4] American Heritage Dictionary, ed. (2005). The American heritage science dictionary. Houghton Mifflin Harcourt. p. 364. ISBN 978-0-618-45504-1.

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