Coastal and Oceanic Landform ( 43. Sea Cave )

                                                                                                                                         Back to Coastal and Oceanic Landform 

  • sea cave known as a littoral cave.
  • Formed by the wave action.
  • Process involved is erosion.
  • Largest caves found on  Norway coast.
  • Littoral caves found in a wide variety of host rocks.


Fingal's Cave,
The Blue Grotto of Capri
  • Ranging from sedimentary-metamorphic to igneous.
  • The host rock must first contain a weak zone.
  • In metamorphic or igneous rock,

Channel Islands of California,
Hawaii’s Na Pali Coast

  • Igneous rocks, such as in the caves on Santa Cruz IslandCalifornia.
  • Most sea-cave walls are irregular and chunky.
  • Reflecting an erosional process.
  • Rock is fractured piece by piece.
  • Some caves walls are rounded and smoothed.

  • True littoral caves not confused with inland caves.
  • Carbonate rocks are found in littoral zones  formed by dissolution,

                    Halong BayVietnam
  • Rainwater may also influence sea-cave formation. 

  • Sea cave chambers  collapse leaving a “littoral sinkhole”.

 - Oregon’s Devil’s Punchbowl 
 - Queen’s Bath, Na Pali
  • Small peninsulas / headlands often have caves.
  •  The Californian island of Anacapa is split into 3 islets by such a process.

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