Pebble finishing for a pool's surface has its perks in terms of increasing the surface life of the pool finish, but indeed it can cause bruises; However, I haven't heard anyone getting a splinter from Pebbled pool surface. That can only be possible if your pool is unmaintained causing twigs or anything that can cause a splinter to enter the pool unnoticed.
A pebble.
No. Chicken bones splinter easily. These splinters can cause serous injury to the digestive tract.
they all cause vibrations
Smaller than that, even; the size of a grain of rice, or smaller.
hail and also bugs I know it is gross but its true
First of all have you found the cause? Pebble tec cracks because either it doesn't get a good bond to the shotcrete or the shotcrete is cracking underneath the pebble. Cracks found in pebble tec must be patched with pebble patch or caulking. To perform a patch that you care about blending with the existing pebble takes a great deal of experience. Great results are possible but not likely until you have made several patches. Also one of the common issues with pebble tec cracking is not so much the material,but rather how much pebble tec is applied to a certain area of the pool/spa. For example, pool steps tend to get more material applied on the transition/curveof the step tread and having too much material can cause a delamination after time. Most rolled bond beams being exposed to the outdoor elements will experience bond failure in time. Most cracks can be repaired by the average homeowner with a little bit of handy skills and pebble patch kit.
Surface waves cause rock to move in a circular path.
A primary cause for surface winds on the earth is the Earths Rotation.
If the pool total alkalinity was adjusted badly, calcium could be pulled out of the pool walls causing pebble release and apparent failure.
craters.
What property of magam cause it to rise towaed earths surface?
the surface waves cause vibrations invisible to the eye. these vibrations shake rocks and stuff on the surface and result in fractional movement.