lutite


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lutite

[′lü‚tīt]
(geology)
A consolidated rock or sediment formed principally of clay or clay-sized particles.
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The Jurassic periclinal closure of the Aralar anticline has a complicated litho-stratigraphic sequence with various types of limestone, marl, calcareous sandstone, siliceous and micro-conglomeratic sandstone, conglomerates and lutite. The depression is partially in-filled (at least 14 m) by fluvial-torrential materials with a predominance of sand, clay and silt, but gravel and small and medium edges can also be observed.
Compressive strength of different types of rock Compressive strength Types of rock (MPa) Sandstone 10.1 Lutite and dispersed gypsum 4.5 Lutite 6.3 Igneous rocks 90 Lutitic sandstone 5.2 Lutite with intercalated sandstone 17.3
According to global geochemical data (Ronov, 1964), the sedimentary lithosphere formed and epizonally transformed during last 3800 million years from the total geological history of the Earth (almost 4500 million years) contains about 75 mass % of lutite accumulations (<0.063 mm) rich in phyllosilicates and their low-grade metamorphic equivalents known under the following terms: clay mud, lutite mud, clay, claystone, argillite, mudstone, clay shale, shale, black shale, consolidated lutite, silty shale, slate, and phyllite.
This interval, some 30 m in thickness, differs largely from its counterpart on the eastern flank: carbonate and chert beds are absent; lutite intercalations are more abundant and lack dark tones; and the size of the gypsum meganodules is often smaller.
Early Proterozoic climates and plate motions inferred from major element chemistry of lutites. Nature, 299(5885), 715-717.
The Cretaceous rocks include an intercalation of folded lutites and well sorted quartz sandstones that unconformably overlies the Saldana Formation to the east (FIGURE 2).
Thickness (m) Upper Cretaceous Maestrichtiense Mixed limestone <30 and dolomites Campanian Argillaceous 25 limestone Massive limestone 120 Santonian Limestone 100 Coniacian Limestone 100 Marls, limestone Turonian and argillaceous 50 Limestone Cenomanian Clay, marls and Argillaceous 15-30 limestone Lower Cretaceous Albian Gravels, sands, 150 lutites and Clays Aptian Sandstones and 600 Lutites Barremian
99[grados]37' W, foret tropicale caducifoliee, lithosol sur lutites, 3.X.1994, J.-N.
These outcrops are mainly lutites, sands, conglomerates, and limestone.
Lawrence the rocks are lower to middle Horton Group coarse to fine siliciclastics (rudites to lutites) that have been extensively faulted and folded.