Cave Formations

Students all have a fascination with underground land formations. These regions are called Karst Landscapes. They are formed by the forces of erosion. Carbonic acid in water dissolves rock and forms cave passages and unusual mineral formations. Caves take 30,000 to 60,000 years to form. They cover 10% of the earth and occur in temperate, tropical, alpine and polar biomes. About 1/4th of the world's people depend on water supplied by karst areas. Human encroachment and pollution are affecting underground regions and the water that humans depend on from them. It is our work to educate children about these places. Set includes 16 subjects and 80 cards. Begin with 8 subjects when introducing caves and the cards appropriate to your student's skill level. "This is a great material when introducing land. Our students are fascinated with it! That and your volcano cards." Thanks from Chris at Park Montessori School.