92 relations: Agate, Air gun, Alba County, Amadeus Basin, Archaeology, Arkansas, Australia, Bacteria, Banded iron formation, Billion years, Bulb of applied force, Chalcedony, Chalk, Cleavage (crystal), Clovis culture, Clovis point, Conchoidal fracture, Concretion, Cryptocrystalline, Cyanobacteria, Devonian, Diagenesis, Diatomaceous earth, Dolostone, Eolith, Eraillure, Felsite, Fieldstone, Fig Tree Formation, Firearm, Flint, Flintlock, Geyserite, Green algae, Greensand, Gunflint chert, Gunpowder, Headstone, Hertzian cone, Iron oxide, Jasper, Lake Magadi, Limestone, Lithic flake, Lithic reduction, Macrofossil, Marl, Metamorphism, Microcrystalline, Micropaleontology, ..., Mineraloid, Miocene, Monterey Formation, Mozarkite, Neogene, New Mexico, Nodule (geology), Novaculite, Obsidian, Oklahoma, Omnipresence, Onyx, Opal, Ouachita Mountains, Petrology, Piatra Tomii, Pilbara Craton, Precambrian, Prokaryote, Quartz, Quartzite, Radiolaria, Radiolarite, Recrystallization (geology), Redox, Rhynie chert, Rhyolite, Romania, Sedimentary rock, Silicon dioxide, South Africa, South Carolina, Stone tool, Striking platform, Swaziland, Texas, Tinderbox, Tool stone, Unicellular organism, United States, Weathering, Whinstone. Expand index (42 more) »
Agate
Agate is a rock consisting primarily of cryptocrystalline silica, chiefly chalcedony, alternating with microgranular quartz.
New!!: Chert and Agate · See more »
Air gun
An air gun (or airgun) is any kind of gun that launches projectiles pneumatically with compressed air or other gases that are pressurized mechanically without involving any chemical reactions, in contrast to a firearm, which relies on an exothermic chemical oxidation (deflagration) of combustible propellants to generate propulsive energy.
New!!: Chert and Air gun · See more »
Alba County
Alba is a county (județ) of Romania, in Transylvania, its capital city being Alba-Iulia with a population of 63,536.
New!!: Chert and Alba County · See more »
Amadeus Basin
The Amadeus Basin is a large (ca. 170,000 km²) intracratonic sedimentary basin in central Australia, lying mostly within the southern Northern Territory, but extending into the state of Western Australia.
New!!: Chert and Amadeus Basin · See more »
Archaeology
Archaeology, or archeology, is the study of humanactivity through the recovery and analysis of material culture.
New!!: Chert and Archaeology · See more »
Arkansas
Arkansas is a state in the southeastern region of the United States, home to over 3 million people as of 2017.
New!!: Chert and Arkansas · See more »
Australia
Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands.
New!!: Chert and Australia · See more »
Bacteria
Bacteria (common noun bacteria, singular bacterium) is a type of biological cell.
New!!: Chert and Bacteria · See more »
Banded iron formation
Banded iron formations (also known as banded ironstone formations or BIFs) are distinctive units of sedimentary rock that are almost always of Precambrian age.
New!!: Chert and Banded iron formation · See more »
Billion years
A billion years (109 years) is a unit of time on the petasecond scale, more precisely equal to seconds.
New!!: Chert and Billion years · See more »
Bulb of applied force
In lithic analysis, a subdivision of archaeology, a bulb of applied force (also known as a bulb of percussion or simply bulb of force) is a defining characteristic of a lithic flake.
New!!: Chert and Bulb of applied force · See more »
Chalcedony
Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite.
New!!: Chert and Chalcedony · See more »
Chalk
Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite.
New!!: Chert and Chalk · See more »
Cleavage (crystal)
Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite crystallographic structural planes.
New!!: Chert and Cleavage (crystal) · See more »
Clovis culture
The Clovis culture is a prehistoric Paleo-Indian culture, named for distinct stone tools found in close association with Pleistocene fauna at Blackwater Locality No. 1 near Clovis, New Mexico, in the 1920s and 1930s.
New!!: Chert and Clovis culture · See more »
Clovis point
Clovis points are the characteristically-fluted projectile points associated with the New World Clovis culture.
New!!: Chert and Clovis point · See more »
Conchoidal fracture
Conchoidal fracture describes the way that brittle materials break or fracture when they do not follow any natural planes of separation.
New!!: Chert and Conchoidal fracture · See more »
Concretion
A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil.
New!!: Chert and Concretion · See more »
Cryptocrystalline
Cryptocrystalline is a rock texture made up of such minute crystals that its crystalline nature is only vaguely revealed even microscopically in thin section by transmitted polarized light.
New!!: Chert and Cryptocrystalline · See more »
Cyanobacteria
Cyanobacteria, also known as Cyanophyta, are a phylum of bacteria that obtain their energy through photosynthesis, and are the only photosynthetic prokaryotes able to produce oxygen.
New!!: Chert and Cyanobacteria · See more »
Devonian
The Devonian is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya.
New!!: Chert and Devonian · See more »
Diagenesis
Diagenesis is the change of sediments or existing sedimentary rocks into a different sedimentary rock during and after rock formation (lithification), at temperatures and pressures less than that required for the formation of metamorphic rocks.
New!!: Chert and Diagenesis · See more »
Diatomaceous earth
Diatomaceous earth – also known as D.E., diatomite, or kieselgur/kieselguhr – is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder.
New!!: Chert and Diatomaceous earth · See more »
Dolostone
Dolostone or dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2.
New!!: Chert and Dolostone · See more »
Eolith
An eolith (from Greek "eos", dawn, and "lithos", stone) is a chipped flint nodule.
New!!: Chert and Eolith · See more »
Eraillure
In lithic analysis (a subdivision of archaeology), an eraillure is a flake removed from a lithic flake's bulb of force, which is a lump left on the ventral surface of a flake after it is detached from a core of tool stone during the process of lithic reduction.
New!!: Chert and Eraillure · See more »
Felsite
Felsite is a very fine-grained volcanic rock that may or may not contain larger crystals.
New!!: Chert and Felsite · See more »
Fieldstone
Fieldstone is a building construction material.
New!!: Chert and Fieldstone · See more »
Fig Tree Formation
The Fig Tree Formation is a stromatolite-containing geological formation in South Africa.
New!!: Chert and Fig Tree Formation · See more »
Firearm
A firearm is a portable gun (a barreled ranged weapon) that inflicts damage on targets by launching one or more projectiles driven by rapidly expanding high-pressure gas produced by exothermic combustion (deflagration) of propellant within an ammunition cartridge.
New!!: Chert and Firearm · See more »
Flint
Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert.
New!!: Chert and Flint · See more »
Flintlock
Flintlock is a general term for any firearm that uses a flint striking ignition mechanism.
New!!: Chert and Flintlock · See more »
Geyserite
Geyserite is a form of opaline silica that is often found around hot springs and geysers.
New!!: Chert and Geyserite · See more »
Green algae
The green algae (singular: green alga) are a large, informal grouping of algae consisting of the Chlorophyta and Charophyta/Streptophyta, which are now placed in separate divisions, as well as the more basal Mesostigmatophyceae, Chlorokybophyceae and Spirotaenia.
New!!: Chert and Green algae · See more »
Greensand
Greensand or green sand is a sand or sandstone which has a greenish color.
New!!: Chert and Greensand · See more »
Gunflint chert
The Gunflint chert (1.88 Ga) is a sequence of banded iron formation rocks that are exposed in the Gunflint Range of northern Minnesota and northwestern Ontario along the north shore of Lake Superior.
New!!: Chert and Gunflint chert · See more »
Gunpowder
Gunpowder, also known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive.
New!!: Chert and Gunpowder · See more »
Headstone
A headstone, tombstone, or gravestone is a stele or marker, usually stone, that is placed over a grave.
New!!: Chert and Headstone · See more »
Hertzian cone
A Hertzian cone is the cone produced when an object passes through a solid, such as a bullet through glass.
New!!: Chert and Hertzian cone · See more »
Iron oxide
Iron oxides are chemical compounds composed of iron and oxygen.
New!!: Chert and Iron oxide · See more »
Jasper
Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases,Kostov, R. I. 2010.
New!!: Chert and Jasper · See more »
Lake Magadi
Lake Magadi is the southernmost lake in the Kenyan Rift Valley, lying in a catchment of faulted volcanic rocks, north of Tanzania's Lake Natron.
New!!: Chert and Lake Magadi · See more »
Limestone
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs.
New!!: Chert and Limestone · See more »
Lithic flake
In archaeology, a lithic flake is a "portion of rock removed from an objective piece by percussion or pressure,"Andrefsky, W. (2005) Lithics: Macroscopic Approaches to Analysis.
New!!: Chert and Lithic flake · See more »
Lithic reduction
In archaeology, in particular of the Stone Age, lithic reduction is the process of fashioning stones or rocks from their natural state into tools or weapons by removing some parts.
New!!: Chert and Lithic reduction · See more »
Macrofossil
Macrofossils, also known as megafossils, are preserved organic remains large enough to be visible without a microscope.
New!!: Chert and Macrofossil · See more »
Marl
Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt.
New!!: Chert and Marl · See more »
Metamorphism
Metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change).
New!!: Chert and Metamorphism · See more »
Microcrystalline
A microcrystalline material is a crystallized substance or rock that contains small crystals visible only through microscopic examination.
New!!: Chert and Microcrystalline · See more »
Micropaleontology
Micropaleontology (also sometimes spelled as micropalaeontology) is the branch of palaeontology that studies microfossils, or fossils that require the use of a microscope to see the organism, its morphology and its characteristic details.
New!!: Chert and Micropaleontology · See more »
Mineraloid
A mineraloid is a mineral-like substance that does not demonstrate crystallinity.
New!!: Chert and Mineraloid · See more »
Miocene
The Miocene is the first geological epoch of the Neogene Period and extends from about (Ma).
New!!: Chert and Miocene · See more »
Monterey Formation
The Monterey Formation is an extensive Miocene oil-rich geological sedimentary formation in California, with outcrops of the formation in parts of the California Coast Ranges, Peninsular Ranges, and on some of California's off-shore islands.
New!!: Chert and Monterey Formation · See more »
Mozarkite
Mozarkite is a form of chert (flint).
New!!: Chert and Mozarkite · See more »
Neogene
The Neogene (informally Upper Tertiary or Late Tertiary) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago (Mya) to the beginning of the present Quaternary Period Mya.
New!!: Chert and Neogene · See more »
New Mexico
New Mexico (Nuevo México, Yootó Hahoodzo) is a state in the Southwestern Region of the United States of America.
New!!: Chert and New Mexico · See more »
Nodule (geology)
In sedimentology and geology, a nodule is small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition, such as a pyrite nodule in coal, a chert nodule in limestone, or a phosphorite nodule in marine shale, from the enclosing sediment or sedimentary rock.
New!!: Chert and Nodule (geology) · See more »
Novaculite
Novaculite, also called Arkansas Stone, is a microcrystalline to cryptocrystalline rock type that consists of silica in the form of chert or flint.
New!!: Chert and Novaculite · See more »
Obsidian
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.
New!!: Chert and Obsidian · See more »
Oklahoma
Oklahoma (Uukuhuúwa, Gahnawiyoˀgeh) is a state in the South Central region of the United States.
New!!: Chert and Oklahoma · See more »
Omnipresence
Omnipresence or ubiquity is the property of being present everywhere.
New!!: Chert and Omnipresence · See more »
Onyx
Onyx is a banded variety of the oxide mineral chalcedony.
New!!: Chert and Onyx · See more »
Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%.
New!!: Chert and Opal · See more »
Ouachita Mountains
The Ouachita Mountains, simply referred to as the Ouachitas, are a mountain range in western Arkansas and southeastern Oklahoma.
New!!: Chert and Ouachita Mountains · See more »
Petrology
Petrology (from the Greek πέτρος, pétros, "rock" and λόγος, lógos, "subject matter", see -logy) is the branch of geology that studies rocks and the conditions under which they form.
New!!: Chert and Petrology · See more »
Piatra Tomii
Piatra Tomii is a late Jurassic limestone outcrop forming a small hill near Răcătau village, Alba county, Romania.
New!!: Chert and Piatra Tomii · See more »
Pilbara Craton
The Pilbara Craton is an old and stable part of the continental lithosphere located in Pilbara, Western Australia.
New!!: Chert and Pilbara Craton · See more »
Precambrian
The Precambrian (or Pre-Cambrian, sometimes abbreviated pЄ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon.
New!!: Chert and Precambrian · See more »
Prokaryote
A prokaryote is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle.
New!!: Chert and Prokaryote · See more »
Quartz
Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.
New!!: Chert and Quartz · See more »
Quartzite
Quartzite (from Quarzit) is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone.
New!!: Chert and Quartzite · See more »
Radiolaria
The Radiolaria, also called Radiozoa, are protozoa of diameter 0.1–0.2 mm that produce intricate mineral skeletons, typically with a central capsule dividing the cell into the inner and outer portions of endoplasm and ectoplasm.The elaborate mineral skeleton is usually made of silica.
New!!: Chert and Radiolaria · See more »
Radiolarite
Radiolarite is a siliceous, comparatively hard, fine-grained, chert-like, and homogeneous sedimentary rock that is composed predominantly of the microscopic remains of radiolarians.
New!!: Chert and Radiolarite · See more »
Recrystallization (geology)
In geology, solid-state recrystallization is a metamorphic process that occurs under temperature and pressure where atoms of a mineral are reorganized by diffusion and/or dislocation glide.
New!!: Chert and Recrystallization (geology) · See more »
Redox
Redox (short for reduction–oxidation reaction) (pronunciation: or) is a chemical reaction in which the oxidation states of atoms are changed.
New!!: Chert and Redox · See more »
Rhynie chert
The Rhynie chert is an Early Devonian sedimentary deposit exhibiting extraordinary fossil detail or completeness (a Lagerstätte).
New!!: Chert and Rhynie chert · See more »
Rhyolite
Rhyolite is an igneous, volcanic rock, of felsic (silica-rich) composition (typically > 69% SiO2 – see the TAS classification).
New!!: Chert and Rhyolite · See more »
Romania
Romania (România) is a sovereign state located at the crossroads of Central, Eastern, and Southeastern Europe.
New!!: Chert and Romania · See more »
Sedimentary rock
Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water.
New!!: Chert and Sedimentary rock · See more »
Silicon dioxide
Silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula, most commonly found in nature as quartz and in various living organisms.
New!!: Chert and Silicon dioxide · See more »
South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa.
New!!: Chert and South Africa · See more »
South Carolina
South Carolina is a U.S. state in the southeastern region of the United States.
New!!: Chert and South Carolina · See more »
Stone tool
A stone tool is, in the most general sense, any tool made either partially or entirely out of stone.
New!!: Chert and Stone tool · See more »
Striking platform
In lithic reduction, the striking platform is the surface on the proximal portion of a lithic flake on which the detachment blow fell; this may be natural or prepared.
New!!: Chert and Striking platform · See more »
Swaziland
Swaziland, officially the Kingdom of Eswatini since April 2018 (Swazi: Umbuso weSwatini), is a landlocked sovereign state in Southern Africa.
New!!: Chert and Swaziland · See more »
Texas
Texas (Texas or Tejas) is the second largest state in the United States by both area and population.
New!!: Chert and Texas · See more »
Tinderbox
A tinderbox is a container made of wood or metal containing flint, firesteel, and tinder (typically charcloth, but possibly a small quantity of dry, finely divided fibrous matter such as hemp), used together to help kindle a fire.
New!!: Chert and Tinderbox · See more »
Tool stone
In archaeology, a tool stone is a type of stone that is used to manufacture stone tools, or stones used as the raw material for tools.
New!!: Chert and Tool stone · See more »
Unicellular organism
A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell, unlike a multicellular organism that consists of more than one cell.
New!!: Chert and Unicellular organism · See more »
United States
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
New!!: Chert and United States · See more »
Weathering
Weathering is the breaking down of rocks, soil, and minerals as well as wood and artificial materials through contact with the Earth's atmosphere, water, and biological organisms.
New!!: Chert and Weathering · See more »
Whinstone
Whinstone is a term used in the quarrying industry to describe any hard dark-coloured rock.
New!!: Chert and Whinstone · See more »
Redirects here:
Arkansas flint, Chert and Flint, Chirt.
References
[1] https://en.wikipedia.org/wiki/Chert