Search results
Results from the WOW.Com Content Network
Chert (/ tʃ ɜːr t /) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, [1] the mineral form of silicon dioxide (SiO 2). [2] Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood. [3]
Hand axe does not relate to axe, which was overused in lithic typology to describe a wide variety of stone tools. [citation needed] At the time the use of such items was not understood. In the particular case of Palaeolithic hand axes the term axe is an inadequate description.
Caricature of Napoleon with a chort A Ukrainian disguised as a Czort on Malanka. A chort (Russian: чёрт, Belarusian and Ukrainian: чорт, Serbo-Croatian čort or črt, Polish: czart and czort, Czech and Slovak: čert, Slovene: črt) is an anthropomorphic malign spirit or demon [1] [2] in Slavic folk tradition.
Knapping is the shaping of flint, chert, obsidian, or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration.
Cher, who is often referred to by the media as the ‘Goddess of Pop’, has been singing and performing since 1965. Since she just turned 75 on May 20, 2021, it’s the perfect time to look back ...
What it looks like: Rosacea causes redness and thick skin on the face, usually clustered in the center. Easy flushing, a stinging sensation, and small, pus-filled pimples are other common signs of ...
The icon looks back on the Beverly Hills shopping trip in her new book 'Cher: The Memoir, Part 1,' which hit shelves Tuesday, Nov. 19
Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, [1] [2] categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start fires. Flint occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones.