What is the relationship between the structures shown below? 
Definitions:
Limestone
A sedimentary rock primarily composed of calcium carbonate (CaCO3), often formed from marine organisms' shells.
Investigation Area
A specific location or region that is being systematically studied or examined for a particular purpose.
Coal
A combustible black or brownish-black sedimentary rock formed from ancient plant material, rich in carbon, used as a fuel.
Oil Seeps
Natural leakages of crude oil from the ground due to geological formations breaking the surface.
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