chert
/ˈtʃɝt/ noun C1**Chert** is a hard, fine‑grained sedimentary rock made mostly of microcrystalline quartz. It shows up as dark, glassy nodules or thin layers within limestone and shale, and it cracks with a conchoidal fracture that’s oddly satisfying to the touch. Because it’s tough and can be shaped into sharp edges, ancient peoples used chert to fashion spear points and cutting tools. When you meet chert on a geological walk, you’ll notice its chalky gleam and the way it sometimes looks like flint, though the two differ in origin: chert forms in marine settings while flint prefers the inland. Its durability makes it a favorite for archaeological studies, and its silica composition even finds modern uses in road construction and as a raw material for making glass.
【核心含义】燧石是一种坚硬、细粒的沉积岩，主要由微晶石英构成。
常呈深色玻璃质结核状，多见于石灰岩中；易与"flint"（火石）混淆，但成因不同（燧石形成于海洋环境）。因其坚硬特性，考古学中常见燧石制石器，现代亦用于筑路材料。
【Significado central】El chert (también llamado sílex) es una roca sedimentaria dura y de grano fino, compuesta principalmente de cuarzo microcristalino.
Se presenta commonly in dark, glassy nodules or thin layers within limestone and shale. It can be confused with flint, but the two have different origins: chert forms in marine environments, while flint (pedernal) forms in inland settings, often within chalk deposits. In Spanish, "sílex" and "pedernal" are more commonly used in everyday language, while "chert" is the standard technical term in geology. Because of its hardness and the sharp edges it produces when fractured (fractura concoidea), it was used in prehistory to make puntas de lanza y herramientas de corte; today it is also valued in archaeological studies and as raw material in road construction and glassmaking.
noun a hard, fine-grained sedimentary rock similar to flint C1
Chert is a hard, flintlike rock used by early humans to make arrowheads.
(名词) 燧石
燧石是一种坚硬、类似火石的岩石，早期人类用它制作箭头。
(sustantivo) sílex [roca sedimentaria dura y de grano fino, similar al pedernal]
El chert es una roca dura similar al pedernal que los primeros humanos usaban para hacer puntas de flecha.
(nom) chaille; silex [Roche sédimentaire dure et à grain fin, de composition proche du silex.]
Le silex est une roche dure que les hommes préhistoriques utilisaient pour fabriquer des pointes de flèches.
(Substantiv) Hornstein; Feuerstein [ein hartes, feinkörniges Sedimentgestein, das dem Feuerstein ähnelt und oft für Werkzeuge verwendet wurde.]
**Chert** ist ein hartes Gestein, das von frühen Menschen zur Herstellung von Pfeilspitzen genutzt wurde.
(名詞) フリントに似た、硬くて粒の細かい堆積岩
チャートは硬くて火打ち石に似た岩石で、古代人が矢じりを作るのに使用した。
(substantivo) sílex [uma rocha sedimentar dura e de granulação fina, semelhante ao sílex]
O chert é uma rocha dura, semelhante ao sílex, usada pelos primeiros humanos para fazer pontas de flecha.
noun Massive, usually dull-colored and opaque, quartzite, hornstone, impure chalcedony, or other flint-like mineral. countable
The geologist identified the rock sample as chert due to its characteristic dull appearance.
(名词) 燧石；角岩；玉髓
地质学家根据其典型的暗淡外观，将岩石样本鉴定为燧石。
(sustantivo) sílex; pedernal; horsteno [Cuarcita masiva, generalmente de color opaco y sin brillo, hornstone, calcedonia impura u otro mineral similar al sílex.]
El geólogo identificó la muestra de roca como sílex debido a su característica apariencia opaca.
(nom) silex; chert [Roche sédimentaire siliceuse, dure et compacte, à aspect vitreux ou mat, formant une variété de silex. (En français : chaille ou silexite.)]
Le géologue a identifié l'échantillon comme de la **chaille** (chert) en raison de son aspect mat caractéristique.
(Substantiv) Hornstein; Feuerstein [Ein massives, meist matt gefärbtes und undurchsichtiges Gestein, das aus Quarzit, Hornstein oder unreinem Chalcedon besteht.]
Der Geologe identifizierte die Gesteinsprobe aufgrund ihres typisch matten Aussehens als **chert**.
(名詞) チャート。緻密で鈍い色をした不透明なチャート岩・角石・不純な玉髄など、 flint に似た鉱物。
地質学者はその特徴的な鈍い外観から、岩石サンプルをチャートと鑑定した。
(substantivo) sílex; pedra-sílex [Quartzito, hornstein, calcedônia impura ou outro mineral semelhante ao sílex, geralmente maciço, opaco e de cor fosca.]
O geólogo identificou a amostra de rocha como chert devido à sua aparência fosca característica.
noun A flint-like tool made from chert. countable
The archaeologist found a finely crafted chert arrowhead at the dig site.
(名词) 燧石工具；燧石箭头
考古学家在挖掘现场发现了一个制作精美的燧石箭头。
(sustantivo) herramienta de sílex; utensilio de pedernal [Una herramienta similar al pedernal hecha de sílex.]
El arqueólogo encontró una punta de flecha de sílex finamente elaborada en el sitio de excavación.
(nom) silex taillé; outil en silex [Outil préhistorique taillé dans une roche siliceuse dure, semblable au silex.]
L'archéologue a découvert une fine pointe de flèche en **silex** (chert) sur le site de fouilles.
(Substantiv) Feuersteingerät; Hornsteingerät [Ein aus **chert** gefertigtes, feuersteinartiges Werkzeug (z. B. eine Pfeilspitze).]
Der Archäologe entdeckte eine kunstvoll gefertigte **chert**-Pfeilspitze an der Ausgrabungsstätte.
(名詞) チャート製の flint に似た道具。
考古学者は発掘現場で精巧に作られた燧石の矢じりを見つけた。
(substantivo) sílex; instrumento de sílex [Uma ferramenta semelhante ao sílex, feita de chert.]
O arqueólogo encontrou uma ponta de flecha de chert finamente trabalhada no sítio de escavação.
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