How can geologists use acid to confirm that the rock towers are made of limestone ?

Limestone is a composite of calcite and dolomite. The chemical formula of calcite is CaCO3. Geologists can use an acid such as HCl for the following reaction.
CaCO3 + 2H(+) + 2Cl(-) ⇒ Ca(2+) + 2Cl(-) + H2CO3
The H2CO3, however, immediately decomposes into H2O and CO2, so by determining that gas is being emitted, aka it is bubbling, they can determine that it is limestone.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later