Tripolitic chert (or tripoli) is a light-colored porous friable siliceous (largely chalcedonic) sedimentary rock, which results from the weathering (decalcification) of chert or siliceous …

What is Chert? Chert is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO 2). It occurs as nodules, concretionary masses, …

Jan 2, 2025 · Chert is a rock that’s both hard and made mostly of tiny pieces of quartz, a mineral that’s found all over the world. It’s so fine-grained, it looks smooth and sometimes even shiny …

Chert is a hard, fine-grained sedimentary rock composed almost entirely of silica (SiO₂) in the form of microcrystalline or cryptocrystalline quartz.

Chert and flint, very fine-grained quartz (q.v.), a silica mineral with minor impurities. Several varieties are included under the general term chert: jasper, chalcedony, agate (qq.v.), flint, …

Sep 8, 2012 · Chert is a hard and compact sedimentary rock made mostly of tiny quartz crystals. It commonly occurs in carbonate rocks, either as nodules or as layered deposits known as …

Chert is a biochemical sedimentary rock made from microcrystalline quartz. It is very hard – registering a 7 on the Mohs hardness scale, and displays conchoidal fracturing.

Feb 28, 2015 · Chert is a sedimentary rock rich in silica. Franciscan chert is formed from the tiny silica shells (0.5-1 mm) of marine plankton called Radiolaria. Radiolarian chert forms where …

Chert is a fine-grained, silica-rich, microcrystalline, cryptocrystalline or microfibrous sedimentary rock that may contain small fossils.

Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is ch...