I am running into difficulty thinning the stones also. I can get the basic shape but then end up with a pregnant center that needs to be reduced to same thickness of rest of stone. Just bought special chisel (yeah, it's cheating but I worry more about efficiency than authenticity right now) that appears to have good results but MUST be aligned with grain ... and expect many failures, but some good, evenly distributed samples. Good Luck. SargeDude
Exfoliation
EXFOLIATION
A large deposit of rock formed over a arge area
the way geologist know that rock layers are undisturbed is the rock layers are folded
Gaps in rock layers that develop when agents of erosion remove existing rock layers are known as unconformities.
frost action
Exfoliation
Exfoliation.
in is a sedimentray rock
EXFOLIATION
sounds like erosionA2. This describes freeze-thaw spalling of rocks.
And megarock or stone
sandstone is a sedimentary rock because of the layers or lines you can see on it
A large deposit of rock formed over a arge area
Toka is a word meaning boulder, rock or large stone. Kōwhatu means stone or rock and is a noun. Kāmaka also means stone or rock and is a noun.
A rock can be gravel or any tiny pebble... so ya... it's a rock.
No, not unless there was a large disturbance that rearranged the layers.