- A 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.
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 Island, California.
- 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 Bay, Vietnam
- 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.