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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.


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


(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.


the branch of geology that studies the mineral composition and structure of rocks, usu. macroscopically. Cf. petrography.lithologic, lithological, adj.
See also: Geology


The study of rocks, especially their composition and texture.
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
References in periodicals archive ?
Site specific depth to groundwater, groundwater flow direction, and lithology will be determined during the subsurface investigation.
The calculation of the shale resource is based on observed flows, following successful fracture stimulation and continued flow testing at Holdfast-1, and takes into account the main shale and mixed lithology formation target zones (the Roseneath Shale, Epsilon Formation, Murteree Shale and the top section of the Patchawarra Formation).
At Ain Khuff, the Khuff formation is 562 feet thick, with alternating lithology from top to bottom being as follows:
95 carat stone within the Pense confirms the prospects of coarser grained parts of this kimberlite lithology and the large stone potential of Orion South.
Samples taken throughout the interval were described by lithology and color, using a binocular microscope.
The kingdom consists of two distinct geological settings, markedly different in age and lithology.
On the other hand visual inspection of heavy minerals, float lithology and gold grains in the HMCs from Zhob River and Homki Nala have indicated a proximal source.
74 km2,- Interpretation of lithology and Facies on the surface of 48.
This hole intersected anomalous levels of copper over 20 metres within a mafic lithology detected from airborne VTEM and ground EM.
Lam (Tithonian): The Lam Fm is similar in the lithology to the Meem.