castle rock edinburgh map

Castle Rock is a volcanic plug in the middle of Edinburgh upon which Edinburgh Castle sits. The rock is estimated to have formed some 350 million years ago during the early Carboniferous period. It is the remains of a volcanic pipe which cut through the surrounding sedimentary rock, before cooling to form very hard dolerite, a coarser-grained equivalen…
Castle Rock is a volcanic plug in the middle of Edinburgh upon which Edinburgh Castle sits. The rock is estimated to have formed some 350 million years ago during the early Carboniferous period. It is the remains of a volcanic pipe which cut through the surrounding sedimentary rock, before cooling to form very hard dolerite, a coarser-grained equivalent of basalt. Subsequent glacial erosion was resisted more by the dolerite, which protected the softer rock to the east, leaving a crag and tail formation.
  • Elevation: 140 m (460 ft)
  • Prominence: c. 80 m (260 ft)
  • Listing: Tump
  • Topo map: OS Landranger 66
  • Rock age: ~350 million years
  • Mountain type(s): Crag and tail, volcanic plug
  • First ascent: Unknown

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Data from: en.wikipedia.org