Words similar to sub-surface

Example sentences for: sub-surface

How can you use “sub-surface” in a sentence? Here are some example sentences to help you improve your vocabulary:

It is also possible to dive and swim in cenotes, sinkholes found in the sub-surface limestone layer of the Yucatán peninsula, caused by millions of years of erosion.
Life was difficult in northern Yucatán, as the lack of surface water and the limestone sub-surface made it difficult to grow commercial crops or raise cattle.