10 Famous Sea Stack Formations

A stack or sea stack is a rock formation made up of a steep or upright column or columns of rock in the sea near a coast. They are formed when part of a headland is eroded by water crashing against the rock or as a result of wind erosion. These impressive formations are intricately created by nature only through time, tide and wind. Here are 10 of the world’s most famous sea stack formations.

Hopewell Rocks (Canada)

photoMike Sheridan/Flickr

New Brunswick’s icon are dark sedimentary conglomerate and sandstone rock formations called Hopewell Rocks. These natural wonders are created by the tides of the Bay of Fundy, the highest tides in the world reaching up to 30 m (98 ft)which happens twice a day. At low tide, visitors can explore the sandstone pillars and when it’s high tide they can choose to paddle a kayak around the rock formations which bears interesting names such as “ET”, “Mother-in-Law” and “Lover’s Arch.”

Haystock Rock (USA)

photoAnne Hornyak/Flickr

Rising at 72 m (235 ft) off the coast of Oregon, USA, Haystock Rock is the third tallest volcanic stack in the world. The basalt sea stack was formed by lava flows coming from the Grand Ronde Mountains millions of years ago. The rock used to be a part of the coastline but years of erosion have since separated it from the headland. It is a haven for many sea birds, including terns and puffins. The famous monolith can be seen in the movies: The Goonies, Kindergarten Cop and the 1979 Steven Spielberg movie, 1941.

The Twelve Apostles (Australia)

photoShiny Things/Flickr

The Twelve Apostles is a collection of giant sea stacks off the shore of Port Campbell National Park in Victoria, Australia. They were formed by the constant wind and tide erosion of the limestone cliffs that started millions of years ago. The stacks were first formed into caves which later became arches that eventually collapsed to form what was initially called the “Sow and Piglets.” The name was changed in the 1950s to the more tourist-luring name “The Twelve Apostles” even though only nine were left.

Old Man of Hoy (Scotland)


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22 Responses to “10 Famous Sea Stack Formations”
  1. Eunice Tan Says...

    On May 25, 2009 at 2:25 am

    Wonderful things done by nature. Very impressive.

  2. Anne McNew Says...

    On May 25, 2009 at 3:08 am

    WoW. This is so marvelous.
    It’s my first time to see all of those. Great post.

  3. Unofre Pili Says...

    On May 25, 2009 at 6:17 am

    Those are so grand and interesting to see. Beautiful article. Thanks for sharing.

  4. Joe Dorish Says...

    On May 25, 2009 at 7:21 am

    Love these rock formations and that is what my picture here is!

  5. nobert soloria bermosa Says...

    On May 25, 2009 at 9:27 am

    nature’s wonders

  6. Mr Ghaz Says...

    On May 25, 2009 at 9:39 am

    Great post!!..that was amazing article and well presented piece..wonderful pics too..I liked it..thanx for sharing this fascinating piece.

  7. CHAN LEE PENG Says...

    On May 25, 2009 at 10:18 am

    Great post as usual!

  8. OhSugar Says...

    On May 25, 2009 at 11:31 am

    Excellent presentation. Great pictures of stack formations.

  9. nenen Says...

    On May 25, 2009 at 1:56 pm

    you got nice one here. love the pictures

  10. Juancav Says...

    On May 25, 2009 at 2:16 pm

    Fascinating stacks all over the world.

  11. The Quail Says...

    On May 25, 2009 at 4:13 pm

    Awesome article and awesome rock formations! Well done!

  12. Jo Oliver Says...

    On May 25, 2009 at 11:11 pm

    love it. this rocks :)

  13. swatilohani Says...

    On May 26, 2009 at 5:39 am

    great artiicle, thnx for sharing

  14. Kate Smedley Says...

    On May 26, 2009 at 9:06 am

    I love this, all stunning stack formations, I like The Twelve Apostles the most I think, great pics too.

  15. Ruby Hawk Says...

    On May 27, 2009 at 8:50 pm

    Remarkable, Nature is wonderful.

  16. CutestPrincess Says...

    On June 10, 2009 at 3:39 pm

    how great thou art…

  17. Michael P. Hughes Says...

    On August 17, 2009 at 7:24 pm

    Why is Morro Rock not considered a Sea Stack?

  18. Name Says...

    On September 1, 2009 at 9:12 pm

    Can a volcano also be considered a stack? Is the top part of the volcano called the stack? I heard this term and was curious about what it refers to.

  19. AMIE Says...

    On December 14, 2009 at 2:02 pm

    errrrrrrrrrr – wudnt dare onley on ere cos i need it for me omework ?

  20. Anuradha Ramkumar Says...

    On January 7, 2010 at 12:08 am

    Wow…they are really amazing.

  21. Artemio S. Tipon Says...

    On March 31, 2011 at 3:35 am

    I thought one might want to see the sea stack formation called \”lakay-lakay\” (old man in the Ilocano dialect) at Claveria, Cagayan at the northern tip of the Philippines (Google Map)

    Artemio S. Tipon

  22. hasdhdkq Says...

    On March 12, 2012 at 4:34 pm

    that was quality

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