caving rock
51Outward Bound Singapore — Logo of the Outward Bound Singapore Outward Bound Singapore (Chinese: 新加坡外展学校) is part of the network of Outward Bound centres worldwide. While Outward Bound is well established in many other countries, the Outward Bound centre in Singapore has… …
52Windblast — is a term commonly used in mining to describe a sudden rush of air or gas due to the collapse of a void.CausesWindblast is common in longwall coal mines, especially those whose roof strata are competent, and do not cave immediately behind the… …
53Maja Harapit — Massive south wall of Maja Harapit Elevation 2,218 m (7,277 ft) …
54Speleology — is the scientific study of caves and other karst features, their make up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology). The term speleology is… …
55Subsidence — For subsidence in the atmosphere, see subsidence (atmosphere). A road destroyed by subsidence and shear, near Castleton, Derbyshire …
56Yorkshire Dales — Protected Area National park entrance sign, near Skipton …
57Germany Valley — Geobox|Valley name = Germany Valley native name = other name = other name1 = category = National Natural Landmark image caption = Germany Valley etymology type = etymology = country = United States country state = West Virginia state region type …
58Drilling rig — For a detailed diagram of a Petroleum drilling rig, see List of components of oil drilling rigs. Drilling rig preparing rock blasting …
59Formosa, Goiás — You may be looking for Formoso. Infobox City official name = Formosa native name = nickname = motto = imagesize = image caption = image imagesize = image caption = image mapsize = map caption = Location in the state of Goiás and Brazil… …
