File:Close up of mid Neolithic to mid Bronze Age cutting or scraping tool on a tertiary flake of heavily patinated Langdale tuff (FindID 611115).jpg

English: Tertiary flake of heavily patinated Langdale tuff, utilised as a chopping or scraping tool between the mid Neolithic to mid Bronze Age. The definite working is confined to the distal end. This consists of two groups of retouch. The first is invasive, scaled, and low angled. The second is short, sub- parallel, low angled, and may represent an attempt to sharpen the implement. It is difficult to account for the differences in patination on the artefact. The most likely explanation is that the older patina was gained in a different location and subsequently brought to the find spot. Dates from c3500 to c1000 BC.

The length is 127mm, width 82mm, and the thickness 27mm.

Other records of artefacts made from Langdale tuff include LANCUM-556645, LANCUM-4F80E4, and YORYM-2507B8 (which has a similar difference in patina).

This rock type is formed from compressed volcanic ash and has a fine grained composition with infrequent crystalline inclusions. Tuff is found in Britain and Ireland in a band that runs down the Irish Sea from the Lake District (the Langdale's source Group VI), County Antrim (Ireland), through North Wales (Graig Lwyd Group VII), and into Cornwall and Devon (Groups XVI and IV respectively). Volcanic tuff is similar to flint in that it can be finely worked, ground and polished to form a variety of tools; however axes are the most common find type and were used across Northern Europe during the Neolithic period.