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1. The gross physical character of a rock or rock formation.
2. The microscopic study, description, and classification of rock.

lith′o·log′ic (lĭth′ə-lŏj′ĭk), lith′o·log′i·cal adj.
lith′o·log′i·cal·ly adv.
li·thol′o·gist n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Geological Science) the physical characteristics of a rock, including colour, composition, and texture
2. (Geological Science) the study of rocks
lithologic, ˌlithoˈlogical adj
ˌlithoˈlogically adv
liˈthologist n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(lɪˈθɒl ə dʒi)

a. (loosely) petrology.
b. the physical characteristics of a rock or stratigraphic unit.
lith`o•log′ic (-əˈlɒdʒ ɪk) lith`o•log′i•cal, adj.
lith`o•log′i•cal•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


the branch of geology that studies the mineral composition and structure of rocks, usu. macroscopically. Cf. petrography.lithologic, lithological, adj.
See also: Geology
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.


The study of rocks, especially their composition and texture.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lithology - the branch of geology that studies rocks: their origin and formation and mineral composition and classification
geomorphology, morphology - the branch of geology that studies the characteristics and configuration and evolution of rocks and land forms
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The latest cuttings over the shakers reflect a sandy shale and this lithology is interpreted as the transition from the deltaic to marine section of the Irwin River, prognosed to be encountered just prior to the Kingia formation.
Acosta said the emergence of the tension cracks, which was initially reported in 2016, was due to the steep slopes and weak underlying lithology.
The circularity ratio of a basin indicates the rate of infiltration and reach time for the excess water in the outlet of the basin, which depends upon lithology, geological conditions and vegetation cover.
The cross plot between the P-impedance and S-impedance can lead to lithology separation and pore fluid type identification to characterize the reservoir.
The variation of coal seam thickness, angle and lithology of roof and floor caused by the erosion zone have a certain impact on the stress distribution (Pearson et al., 1990; Zhang et al., 2014).
Oil shale occurs in the Upper Permian Lucaogou Formation ([P.sub.2]l) whose lithology is mainly made up of gray-black oil shale, dolostone, dolomitic sandstone, dolomitic siltstone, sporadic pyrite, tuff, and shale argillaceous siltstone containing bitumen.
Studies have indicated that landslides in Manipur are mostly anthropogenically induced, caused as a result of modification of slopes for construction, widening of road, quarrying for the construction materials, fragile lithology, complex geological structures and heavy rainfall," Mahesh Sharma, Minister of State for Environment, said in the Rajya Sabha on August 6.
For wells with limited data, the tool can make standalone porosity and lithology measurements.
A methodology to delineate the potential groundwater recharge zones by means of Geographical Information Systems and Remotely Sensed datasets was devised and spatial analyses were conducted using surface slope, drainage network, lithology and settlements in Pishin-Lora river basin.
When the roof lithology is a hard roof, the subsidence of the lateral roof obviously decreases due to the high strength and stiffness of the roof, especially in lower strata, such that the shear slip of a hard roof is lower than that of other types of roofs.