• This rock has erosion holes, too.
  • So does this one.

Rock with erosion holes in it

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Just a rock (actually, more than one) exposed at low tide at Cabrillo National Monument, California, USA. Erosion has gouged out little smooth holes in the rock in the center, and in others in the area. Nature seems to abhor a vacuum -- most of the holes are filled by other rocks, which, I suppose, will, with the action of the waves, erode the holes further.

This rock in the center with all the holes is roughly fist-size. Larger sizes of this photo are available. (Click on the magnifier icon above the photo)

June 2013: Thanks, viewers! This photo has been viewed over 15,000 times, and is in thirteen galleries, both of which amaze me!

Rachel Pennington, l horta, and 64 other people added this photo to their favorites.

View 20 more comments

  1. carrollUSA 86 months ago | reply

    i like it as it is-- REAL!

  2. *Eyes* 84 months ago | reply

    Nice shot.. great idea!

    **** I found this photo following a set link in the Explore My Sets - Add 1, Comment/Fave 3 Group ****

  3. ℙαґḯṧḯ℮ηηε 84 months ago | reply

    I have found these kind of rocks with the boring clams--dead--still in a few of the holes. Boring clams bore holes right through rock.

  4. lao_ren100 83 months ago | reply

    I'm pretty sure that the Rockeries group would love to have this.

  5. cool aid 81 months ago | reply

    Hi, I'm an admin for a group called Rampageing Rocks, and we'd love to have this added to the group!

  6. SF EYES (Robert Ogilvie) 80 months ago | reply

    I have picked up those sorts of rocks from beaches near San Francisco to bring them home and watch them fall apart over time and realize that they are actually made of clay.

  7. Jacqueline Clowting 77 months ago | reply

    I found this photo following a set link in the Explore My Sets - Add 1, Comment/Fave 3 Group
    you have a great eye for detail

  8. thegarpster2002 76 months ago | reply

    So that's how that happens!

    Living by the ocean, for years I have seen those unusual holes, as if drilled into smoothed rocks. But nobody I've asked seems to know how they were caused.

    Now I know! :-) Thanks.

  9. C. VanHook Images (vanhookc) 75 months ago | reply

    This is fabulous for the classroom study of rocks and minerals. I gave a recommendation to a fellow teacher to use! And I appreciate the Creative Commons designation!
    Nice capture!

  10. griffithjune49 71 months ago | reply

    Please add this Precious Stone Photo to ~GemStones~
    .....a "NEW" Thread in Heaven *Times Ticking!*
    Please post this to the Thread ..ONLY!!
    Thank you for helping to Build the Kingdom!!
    www.flickr.com/groups/insideheaven/discuss/72157615684592...

  11. Starting_Fresh 71 months ago | reply

    Hi, I'm an admin for a group called I Love Rocks!, and we'd love to have this added to the group!

  12. moa.snoa 67 months ago | reply

    Hi, I'm an admin for a group called Stones, pebbles and rocks, and we'd love to have this added to the group!

    Great photo!

  13. Martin LaBar 67 months ago | reply

    Thanks, everyone!

  14. garlandcannon 63 months ago | reply

    This rocks. I'lll have to show it to my son the geologist. :)

  15. Pablo Suárez - Buenos Aires 51 months ago | reply

    I like the texture here and the soft colors as well

  16. waxyleaves 48 months ago | reply

    Great colors and shapes

  17. Plum leaves 43 months ago | reply

    I really, really like this...quite fascinating! The Cabrillo National Monument is a beautiful spot.

  18. ausfi 25 months ago | reply

    Over 14 thousand views! How do people find these photos, I was looking for special stones, I have one with holes
    but not as interesting as this and it has just 20 views LOL

  19. ausfi 25 months ago | reply

    Thank you for adding this and other photos in the Stone group.

  20. Biking Nikon SFO 9 months ago | reply

    Great shot of the CA coast! We would love to have it in the California Coastal Geology group!

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