The pine rocklands in Miami-Dade County and Everglades National Park are found on limestone substrates along the Miami Rock Ridge, an exposed oolitic limestone matrix 2–7 meters above sea level that extends from northern Miami to the southern Everglades with disjunct sections in the Lower Keys.[4] This limestone is extremely sharp, porous, and prone to weathering and dissolution and which help form their characteristic solution holes. These holes can house water, sand, or organic soil, and contribute to small changes in elevation that result in substantial changes in vegetation. Interlaced with the limestone ridge are lower elevation wet prairies and marshes and higher elevation rock hammocks.[5][7] These wet prairies and marshes create an island-like effect isolating the higher elevated pine rocklands.