Dacite Formation, on and north of the top of Middle Dodd, and with a small area along the edge of the northern corrie of Red Screes. The rock is white-weathered dacite lava, and was formed by the eruption of viscous or semi-mobile lava rich in silica from a steep-sided volcano, perhaps filling in hollows on an old erosion surface. Drift deposits of glacial till derived from the last ice-age have accumulated on the lower slopes of Red Screes, and on the top of the ridge. Mining and quarrying Kirkstone Quarry (named Pets Quarry on Ordnance Survey maps) is prominent on the southeast side of Red Screes, below Kirkstone Pass. It has produced green and blue-black slate for building and architectural purposes. The quarry went into administration in 2012. At present Burlington Stone markets three types of stone called Kirkstone Brathay Blue/Black, Kirkstone Sea Green and Kirkstone Silver Green. Quarrying took place within the Seathwaite Fell Sandstone Formation. The green slate was formed from fine-grained sedimentary rock within that formation, which was later metamorphosed to form slate. The remains of a small quarry on the western slopes of the fell can still be seen. This was used to extract stones for wall-building, and even the remains of a sled-track exist, leading down to a series of field walls in Scandale. There is evidence of mining in Caiston Glen, with the mouth of a level opening about halfway up the beck. This was an unsuccessful trial for lead and extends about into the fellside. There is a further small working nearby. There are also the remains of a trial for copper on the eastern flank, a level being driven into the fell from close to the modern road. Names Red Screes is an example of a fell which has taken the name of one of its sides. The screes which cover the steep eastern slopes above the Kirkstone Pass appear to have a reddish colouration. Snarker Pike is probably ‘snake peak’ from Old English snaca, a snake, plus pike. In 1764 its name was recorded as Snake Pike. Originally it may have been Snake How (from snaca plus dialect how(e), a hill or mound), which became contracted to Snarker and then had ‘pike’ added. It seems strange that this hill should be associated with snakes, though adders are not uncommon in the Lake District. Pike is a dialect work for a peak