Stylolite
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Stylolites are serrated surfaces within a rock mass at which mineral material has been removed by pressure dissolution, in a deformation process that decreases the total volume of rock. Minerals which
Stylolites in limestone
A stylolite viewed in thin section in plane polarized light in a packstone, Oehrlikalk formation of the Axen nappe, Wellenberg, Switzerland
Stylolite in a Slovakian limestone
Stylolites affecting deformed coral limestone from Devon, England
Chert
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Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide. Chert is characteristically of biological origin, but may
Stylolite
…minerals, in which case stylolites can be recognized by change in texture of the rock. They occur most commonly in homogeneous rocks, carbonates, cherts, sandstones, but they can be found in certain igneous rocks and ice. Their size vary from microscopic contacts between two grains (microstylolites) to…
A hand sized sample of chert
Chert (dark bands) in the Devonian Corriganville-New Creek limestone, Everett, Pennsylvania
Folded beds of chert comprising the Late Permian to Jurassic-aged Liminangcong Formation at Busuanga, Palawan, Philippines
Chert nodule within soft limestone at Akçakoca, Turkey