Blowhole (geology)

Sea-based blowhole
Land-based blowhole

In geology, a blowhole or marine geyser is formed as sea caves grow landward and upward into vertical shafts and expose themselves toward the surface, which can result in hydraulic compression of seawater that is released through a port from the top of the blowhole.[1] The geometry of the cave and blowhole along with tide levels and swell conditions determine the height of the spray.[2][3]

  1. ^ Bell, F. G.; Bell, Frederic Gladstone (2007). Engineering Geology. Elsevier. p. 140. ISBN 978-0-7506-8077-6.
  2. ^ Cite error: The named reference :2 was invoked but never defined (see the help page).
  3. ^ Bunnell, Dave (2008). "Vertical sea caving" (PDF). NSS News. 66 (10). National Speleological Society: 11–18.