The article describes 81 different types of karst landscapes and how they form. Karst landscapes are areas where the ground has dissolved to create unique features like caves and sinkholes. The researchers grouped the karst types based on their characteristics and how they develop over time. They found that karst landscapes can be classified as either static (unchanging) or dynamic (changing). The static types can be further divided into azonal (not influenced by climate) and zonal (affected by climate) subgroups. Zonal karst types can exist in different climates like tundra, temperate, subtropical, and tropical regions. The researchers also looked at factors like the age of the landscape, the type of rock, and the surface features to distinguish between different karst types.