While sedimentary rocks can be found all over the world, they are most commonly found in areas that were once covered by water, like:

* Coastal areas: The constant action of waves and tides erodes rocks and deposits sediments along coastlines.

* River valleys: Rivers carry sediment downstream, depositing it along their courses and forming layers.

* Deserts: While deserts may seem dry, they can still experience wind erosion and deposition, creating sedimentary rock formations.

* Ocean basins: The vast ocean floor receives a constant rain of sediment, much of it originating from rivers and coastal erosion.

However, the distribution of specific types of sedimentary rocks depends on the geological history and climate of a region. For instance:

* Sandstone is common in areas with abundant sand sources, like deserts or coastal regions.

* Limestone forms in areas with warm, clear waters rich in marine life, like the Caribbean.

* Coal forms from the accumulation of plant matter in swamps or bogs.

So, while sedimentary rocks are found globally, their prevalence and specific types vary significantly based on the geological and climatic conditions of a region.