Sea caves are formed when waves cause erosion of coastal rock formations. Such rivers are frequently found in regions with limestone geologic formations. Balancing Rocks are geological formations all over Zimbabwe. Some geological formations in Shandong are rich in fossils. Groundwater plume modeling is difficult due to underlying karst formations. The bedrock is chalk of various formations. Geologists have subdivided the rocks comprising Mount Everest into three units called formations. There was also light training of forming several formations. The prequels depict a vast expanse of desert with jagged rock formations. RMCs are similar to corps formations in Western armies. Mining in hard and soft rock formations require different techniques. Most tombstones are in the northern-most tufa formations. Petroleum is a naturally occurring liquid found in rock formations. It consists mainly of Archean rock formations. There are many rock formations on Mount Erebus.