chert nodule
1chert, chert nodule — 1. Black, brown or grey rock, consisting of very fine grained silica, that occurs as horizons of nodules and discontinuous bands, generally less than 200mm thick, within many limestones. It is very hard and almost insoluble in water, so… …
2nodule — A small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate, normally having a warty or knobby surface and no internal structure, and usually exhibiting a contrasting composition from the enclosing sediment or rock… …
3Nodule (geology) — A nodule in petrology or mineralogy is a secondary structure, generally spherical or irregularly rounded in shape. Nodules are typically solid replacement bodies of chert or iron oxides formed during diagenesis of a sedimentary rock. Nodules may… …
4nodule — /noj oohl/, n. 1. a small node, knot, or knob. 2. a small, rounded mass or lump. 3. Bot. a tubercle. [1590 1600; < L nodulus a little knot, equiv. to nod(us) NODE + ulus ULE] * * * In geology, a rounded mineral concretion that is distinct from,… …
5Knapping — A knapper is a person who shapes flint, chert, obsidian or other stone through the process of knapping or lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat faced stones for building or facing walls,… …
6включение кремнистой породы — — [http://slovarionline.ru/anglo russkiy slovar neftegazovoy promyishlennosti/] Тематики нефтегазовая промышленность EN chert nodule …
7Flint — (or flintstone) is a hard, sedimentary cryptocrystalline form of the mineral quartz, [ [http://webmineral.com/data/Quartz.shtml General Quartz Information] Webmineral.com (page contains java applets depicting 3d molecular structure)] [… …
8Concretion — For other uses, see enterolith and nodule (geology). Septaria redirects here. For the genus of gastropods, see Septaria (gastropod). Concretions on Bowling Ball Beach (Mendocino County, California) weather out of steeply tilted Cenozoic mudstone… …
9Agate — For other uses, see Agate (disambiguation). Agate Banded agate (agate like onyx); the specimen is 2.5 cm (1 inch) wide General Category …
10Flint tool — Chipped stone tools were made by stone age peoples worldwide. Paleolithic tools were relatively simple, repeated small flakes being struck or pressed from a cobble or nucleus until the required shape was achieved. This is called knapping. Freshly …
- 1
- 2
