Posted: Nov 04, 2018 1:32 pm
Reviving this thread because I've had a chance to post some pics of wet rock.
Newly exposed rock. Still blue. About 5 years old. Not long enough to oxodise. You can see the older rock on the upper part of the pic. Don't know how old but it has "rusted" already.
In the center is an area where the type of "fairy house" is forming. The grandkids call it that!
Now, is that section growing or is it dissolving? There lots of those "fairy house" formations all over the rocks. Some are large enough to put your hand in.
On this picture you can see the old exposed level (with the blue rock and the white quartz chips), then the ground level(the dark soil stained section), and the the area that was below the surface. Note the hollowed out pieces. I'm guessing those missing round pieces were once white quartz chips that have dissolved in rain water that has penetrated the surface and along with other minerals, has eaten the white pieces away.
It looks as if water was trapped on the right side of the vertical crack as that is where hollows have formed. Perhaps the drainage was better on the left side and water wasn't retained as much.
halucigenia wrote:
It is difficult to tell exactly what rock type it is from the pictures but if you have a sample that you could crack open and wet with water and get a close up image it might be easier to tell.
- DSC_8464.JPG (327.48 KiB) Viewed 1936 times
- DSC_8466.JPG (349.93 KiB) Viewed 1936 times
Now, is that section growing or is it dissolving? There lots of those "fairy house" formations all over the rocks. Some are large enough to put your hand in.
- DSC_8468.JPG (477.36 KiB) Viewed 1936 times
It looks as if water was trapped on the right side of the vertical crack as that is where hollows have formed. Perhaps the drainage was better on the left side and water wasn't retained as much.