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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.
References in periodicals archive ?
Jaanusson (1995) noted that in Estonia the boundary between these stages does not coincide with a distinct change in macro- and microfauna and moreover is situated within a lithologically uniform sequence.
The blocks in which the fossils were found correspond lithologically to lenses of bioclastic limestones with a significant content of macrofossils (mollusks and echinoderms).
The Mayflower Hill and Madrid formations are similar lithologically and may be juxtaposed across the Central Maine Boundary fault, whose location is uncertain in the critical area (Figs.
Lithologically, the Formation consists of interbedded nodular limestone, Marl and Shale.
It is lithologically represented by brownish-gray clays with jarosite tarnish and inter-layers of gray, fine-grained sandstones, and by marlaceous and sideritic concretions.
Lithologically these beds contrast with the underlying Dhok Pathan rocks with prevailing orange and pink colors of the sediments (Cheema et al.
Each molecule of the rock contributes to an intrinsically strong structure that has remained relatively stable (with a few noteworthy exceptions as outlined above) both during and after construction; each molecule plays its role in the formation of the '600 m thick sequence of massively bedded, lithologically homogenous, well cemented carbonates' (Rose, 2000: 249).
In places, this formation is missing and the overlaying formation Amman Silicified Limestone directly overlays the underlying formation of Wadi As-Sir Formation; then Amman Silicified Limestone Formation is found; lithologically, this Formation is composed of dark gray to brown chert intercalated with limestone.
The mineralisation is hydrothermal in nature and is controlled both structurally and lithologically.
Lithologically it represents varied composition having coarse and fine grained sandstones, limestone, dolomite and compact, splintery and fissile shales [1,2].
1992): Smectite-to-illite conversion in a geothermally and lithologically complex Permian sedimentary sequence.