It is called an inukshuk.
A stack of rocks built at the top of a mountain is called a cairn. They are often used as trail markers or symbols of accomplishment by hikers and mountaineers.
Check "cairn" for an extensive explanation of this activity and various meanings attributed to it.
A group of pancakes is called a stack.
When rocks stack on each other, contact metamorphism can occur. This type of metamorphism happens when the high temperature and pressure from nearby molten rock alter the composition of the rocks in contact.
burial
the support for a stack of hay
Burial metamorphism.
People that do this are called "rockhounds".
Its called a reem
Some of the types of rocks and rock formation that someone would find in India would be sedimentary rocks, metamorphic rocks, igneous rocks, peak, and stack rocks.
An error condition that occurs when an item is called for from the stack, but the stack is empty.
The Old Harry Rocks are England, and they have a stack and a stump.