Topic ID #27834 - posted 3/23/2013 6:48 PM

anyone having knowledge about the pattern on this rock



madexplorer

http://www.flickr.com/photos/94319086@N07/8584744798/in/photostream




Post ID#20038 - replied 3/24/2013 10:21 AM



DougRM

Really kind of hard to tell from the photo what it is. Though it looks natural. You would be amazed how many natural rock formations look man made. More photos in better light would be helpful of you have them.

Post ID#20046 - replied 3/26/2013 7:10 PM



rock_licker

That is most likely a natural sedimentary formation. There's not a scale and I'm not super familiar with the Tirah region, but basically it's like this-

The more eroded "cup"-like portions are probably shale or mudstone. The raised portions represent cracks in the mud when the water that deposited the clayey mud dried up (think vertisols). The mud cracks were filled in by a tougher sediment like quartzite sand grains.Combine the two, and you get this pattern when the softer material is eroded at a higher rate than the harder material (basically, it's mud cracks in reverse)

Post ID#20557 - replied 9/26/2014 6:36 PM



shirley0353

I have not been on this site before...how do I see a picture?

Post ID#20562 - replied 9/29/2014 5:12 AM



rkeyo

Moderator
Cut and paste the url into the address bar.

Post ID#20571 - replied 9/30/2014 7:19 AM



geoarc

It looks like honeycomb weathering. An article on its origin can be found at:

http://tafoni.com/Bibliography_files/Origin%20of%20Honeycomb%20Weathering.pdf

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