In geography and geology, a cliff is a vertical, or nearly vertical, rock exposure. Cliffs are formed as erosion landforms by the processes of weathering and erosion. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually formed by rock that is resistant to weathering and erosion. Sedimentary rocks most likely to form cliffs include sandstone, limestone, chalk, and dolomite. Igneous rocks such as granite and basalt also often form cliffs.
The International Mountaineering and Climbing Federation or UIAA recognise eight-thousanders as the 14 mountains that are more than 8,000 metres (26,247 ft) in height above sea level, and are considered to be sufficiently independent from neighbouring peaks. However, there is no precise definition of the criteria used to assess independence, and since 2012 the UIAA has been involved in a process to consider whether the list should be expanded to 20 mountains. All eight-thousanders are located in the Himalayan and Karakoram mountain ranges in Asia, and their summits are in the death zone.
Wuhan Greenland Center is an unfinished skyscraper in Wuhan, China. Construction has stalled since August 2017 at the 96th floor. Due to airspace regulations, it will be redesigned so its height does not exceed 500 meters above sea level. Another Chinese building, Ping An Finance Center, was also scaled down for similar reasons.
Grizzly Peak is a high mountain summit in the Front Range of the Rocky Mountains of North America. Also known as Grizzly Peak D, the 13,433-foot (4,094 m) thirteener is located in Arapaho National Forest, 2.1 miles (3.4 km) southeast by east of Loveland Pass, Colorado, United States, on the Continental Divide between Clear Creek and Summit counties. Its proximate parent peak is Torreys Peak.
Chengdu Greenland Tower is a supertall skyscraper currently on hold in Chengdu, Sichuan, China. It will have a height of 468 metres (1,535 ft) with 101 floors. Construction began in 2014 and was halted in early 2019. If completed, it will become the tallest building in Chengdu and southwestern China.
The Lindbergh Range or Lindbergh Nunataks is a mountain range in King Christian IX Land, eastern Greenland. Administratively the range is part of the Sermersooq Municipality.
Mountains of Azerbaijan cover approximately 60 percent of the country's land area. There are three mountain ranges in the territory of Azerbaijan, which are the Greater Caucasus, the Lesser Caucasus, and the Talysh Mountains.
