What type of rock has an abundant supply of groundwater?

Sedimentary rock is known for having an abundant supply of groundwater due to its porous and permeable nature. These rocks, which are formed from the accumulation of sediments, can include materials like sand, silt, and clay that often have significant spaces between particles. This porosity allows water to easily infiltrate and be stored within the rock formations, creating aquifers that can supply groundwater.

Additionally, sedimentary rocks like sandstone and limestone are particularly good reservoirs for groundwater because they often have large voids or openings in their structure that can hold water. In contrast, igneous and metamorphic rocks tend to be more densely packed and less porous, making them less effective in storing and transmitting water. Volcanic rock, while it can hold water in some cases, generally doesn’t have the same capacity for groundwater storage as sedimentary rock. Thus, sedimentary rock stands out as the type of rock with the most abundant groundwater supply.