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Paramoudras, paramoudra flints, pot stones or potstones are flint nodules found mainly in parts of north-west Europe: Norfolk (United Kingdom), Ireland, Denmark, Spain and Germany. In Norfolk they are known as pot stones and can be found on the beach below Beeston Bump just outside Beeston Regis. In Ireland they are known as paramoudras.
Flint occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. [3] [4] Inside the nodule, flint is usually dark grey or black, green, white, or brown in colour, and has a glassy or waxy appearance. A thin, oxidised layer on the outside of the nodules is usually different in colour, typically white and rough in ...
In geology and particularly in sedimentology, a nodule is a small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition from the enclosing sediment or sedimentary rock. Examples include pyrite nodules in coal, a chert nodule in limestone, or a phosphorite nodule in marine shale.
The nodules are most typically along bedding planes or stylolite (dissolution) surfaces, where fossil organisms tended to accumulate and provided a source of dissolved silica, but they are sometimes found cutting across bedding surfaces, where the chert fills fossil burrows, fluid escape structures, or fractures. Nodules under a few centimeters ...
An eolith (from Greek "eos", dawn, and "lithos", stone) is a flint nodule that appears to have been crudely knapped. Eoliths were once thought to have been artifacts, the earliest stone tools, but are now believed to be geofacts (stone fragments produced by fully natural geological processes such as glaciation).
Chert is a siliceous (silica) stone, a variety of quartz similar to flint but more brittle. It naturally occurs as large, flat, elliptically shaped nodules in creek beds, and sometimes as hill-top residuum. The nodules were formed as part of the Ullin limestone formation during the Mississippian geologic period (roughly 359 to 318 million years ...
Grime's Graves is a large Neolithic flint mining complex in Norfolk, England.It lies 8 km (5.0 mi) north east from Brandon, Suffolk in the East of England.It was worked between c. 2600 and c. 2300 BCE, although production may have continued through the Bronze and Iron Ages and later, owing to the low cost of flint compared with metals.
Bands of flint nodules occur throughout the chalk but are more numerous in parts of the succession than others. Flint is a variety of chert, a microcrystalline or cryptocrystalline form of quartz the mode of formation of which is still debated. [6]