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Ojos del Salado
- ...that Ojos del Salado (pictured) is the highest volcano on Earth?
- ...that the Toronto Magnetic and Meteorological Observatory was originally built to study fluctuations in Earth's magnetic field?
- ...that Atlantic hurricane reanalysis is an ongoing project within the National Oceanic and Atmospheric Administration which seeks to correct and add new information about past Atlantic tropical cyclones?
- ...that Robert Case, a National Weather Service meteorologist, dubbed the 1991 Halloween Nor'easter "The Perfect Storm"?
- ...that the 1912 Novarupta eruption of Mount Katmai was the largest of the 20th century?
- ...that a tuya (pictured) is a type of flat-topped, steep-sided volcano formed when lava erupts through a thick glacier or ice sheet?
- ...that in the United States, on average tornadoes are around 500 feet (150 m) across, and stay on the ground for 5 miles (8 km)?
- ...that dust storms can carry large amounts of dust, so much so that the leading edge of one can appear as a solid wall of dust as much as 1.6 km (1 mile) high?
- ...that the area of the world Ocean is 361 million square kilometers, its volume is approximately 1.3 billion cubic kilometers, and its average depth is 3,790 meters?
- ...that three quarters of the earth's atmosphere lies within the troposphere, and the depth of this layer varies between 17 km at the equator and 7 km at the poles?
- ...that the Mariana Trench is the deepest point in the ocean?
- ...that nearly 10 years before the 2008 Atlanta Tornado, the Dunwoody Tornado (pictured) caused significant damage just outside the city limits?
- ...that the Lorain-Sandusky tornado was both the deadliest tornado and part of the deadliest tornado outbreak in Ohio history?
- ...that Cyclone Gamede in February 2007 was among the wettest tropical cyclones on record, dropping more than 5.5 m (18 ft) in a nine day period on Réunion island?
- ...that in Madagascar and Mozambique, Cyclone Jokwe killed 16 people, left at least 55400 homeless, and destroyed nearly 10000 houses?
- ...that following the Cambrian explosion, about 535 mya, there have been five mass extinctions?
- ... that New Zealand geologist Patrick Marshall (pictured) was the first who used the term "andesite line"?
- ...that the Earth's magnetic field is shaped roughly as a magnetic dipole, with the poles currently located proximate to the planet's geographic poles?
- ...In total, about 401 people have been outside the Earth's atmosphere as of 2004, and, of these, twelve have walked on the Moon?
- ...that the Apache-Sitgreaves National Forest is a 2 million acre (8000 km²) National forest which runs along the Mogollon Rim and the White Mountains in east-central Arizona and extending into New Mexico, USA?
- ...that the Himalaya mountain range is the world's highest mountain range?
- ... that the 1999 Chamoli earthquake in India, in which 103 people died, was also felt in the Baitadi, Dadeldhura and Kanchanpur districts in Nepal?
- ... that plate reconstructions (example pictured) that use magnetic stripe patterns can only go back to the Jurassic period, as there is no older oceanic crust?
- ...that during hot greenhouse periods in Earth's history, the tropics appeared to be cooler than they are today?
- ...that the 2002 Sumatra earthquake is considered to be a foreshock of the 2004 Indian Ocean earthquake?
- ...that the geology of the Grand Canyon area includes more than 40 identified rock layers?
- ...that Bristol Diamonds were popular souvenirs for visitors to the spa at Hotwells, Bristol in the eighteenth and nineteenth centuries?
- ...that hoodoos are tall skinny spires of rock that protrude from the bottom of arid basins and badlands?
- ...that a pit crater (example pictured), unlike an impact crater, is formed by the ground sinking over a void such as an emptied magma chamber or caldera?
- ...that the late Paleozoic environment of the Chaco-Tarija sedimentary basin of Bolivia has been likened to that of present-day Labrador Sea?
- ...that there was intense volcanic activity in Uruguay during the Cretaceous period about 130 million years ago?
- ...that six prehistoric meteorite impacts have created large astroblemes affecting the geology of Saskatchewan?
- ... that the Wairau, Awatere, Clarence and Hope faults, are the main active faults of the Marlborough Fault System, and carry most of the displacement on the Australian-Pacific plate boundary in northern South Island?
- ... that a revolution in burrowing marks the base of the Cambrian period, and is followed by the Cambrian explosion of animal diversity?