Here's why:

* Bedrock: This is the solid, impenetrable rock that lies beneath the Earth's surface. It's often formed from igneous, metamorphic, or sedimentary rock.

* Aquifer: This is an underground layer of rock or sediment that can hold and transmit groundwater. It's typically made of porous materials like sandstone, gravel, or fractured rock.

How it works:

1. Precipitation: Rain falls on the ground and infiltrates the soil.

2. Percolation: The water moves downward through the soil and eventually reaches the bedrock.

3. Aquifer Formation: If the bedrock has cracks or spaces (pores), the water can continue moving downwards, filling those spaces and forming an aquifer.

So, in summary, aquifers are located beneath the bedrock, within the spaces and cracks of the underlying rock formations.