paragraph_text: Tufft Nunatak () is a small nunatak 3 nautical miles (6 km) southwest of Mount Bradley and 4.6 km south of Senokos Nunatak, Trinity Peninsula in Graham Land, Antarctica. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Roger Tufft of the Falkland Islands Dependencies Survey (FIDS), a member of the reconnaissance party for the Detroit Plateau journey in February 1957.

paragraph_text: The Lyon Nunataks () are a group of nunataks lying west of the Grossman Nunataks and northwest of the Behrendt Mountains, in Palmer Land, Antarctica. They include Grossenbacher Nunatak, Holtet Nunatak, Christoph Nunatak and Isakson Nunatak. The group was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1961–67, and was named by the Advisory Committee on Antarctic Names after Owen R. Lyon, hospital corpsman, U.S. Navy, chief petty officer in charge of Eights Station in 1965.

paragraph_text: The continental margin, between the continental shelf and the abyssal plain, comprises a steep continental slope followed by the flatter continental rise. Sediment from the continent above cascades down the slope and accumulates as a pile of sediment at the base of the slope, called the continental rise. Extending as far as 500 km (310 mi) from the slope, it consists of thick sediments deposited by turbidity currents from the shelf and slope. The continental rise's gradient is intermediate between the slope and the shelf, on the order of 0.5 -- 1 °.

paragraph_text: Glacial bodies larger than 50,000 km2 (19,000 sq mi) are called ice sheets or continental glaciers. Several kilometers deep, they obscure the underlying topography. Only nunataks protrude from their surfaces. The only extant ice sheets are the two that cover most of Antarctica and Greenland. They contain vast quantities of fresh water, enough that if both melted, global sea levels would rise by over 70 m (230 ft). Portions of an ice sheet or cap that extend into water are called ice shelves; they tend to be thin with limited slopes and reduced velocities. Narrow, fast-moving sections of an ice sheet are called ice streams. In Antarctica, many ice streams drain into large ice shelves. Some drain directly into the sea, often with an ice tongue, like Mertz Glacier.

paragraph_text: Earlier theories (e.g. by Alfred Wegener and Alexander du Toit) of continental drift postulated that continents ``ploughed ''through the sea. The idea that the seafloor itself moves (and also carries the continents with it) as it expands from a central axis was proposed by Harry Hess from Princeton University in the 1960s. The theory is well accepted now, and the phenomenon is known to be caused by convection currents in the asthenosphere, which is ductile, or plastic, and the brittle lithosphere (crust and upper mantle).

paragraph_text: Continental drift is the movement of the Earth's continents relative to each other, thus appearing to ``drift ''across the ocean bed. The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his theory was rejected by some for lack of a mechanism (though this was supplied later by Arthur Holmes). The idea of continental drift has been subsumed by the theory of plate tectonics, which explains how the continents move.

paragraph_text: In colonial times, the Thirteen Colonies used a militia system for defense. Colonial militia laws -- and after independence those of the United States and the various states -- required able - bodied males to enroll in the militia, to undergo a minimum of military training, and to serve for limited periods of time in war or emergency. This earliest form of conscription involved selective drafts of militiamen for service in particular campaigns. Following this system in its essentials, the Continental Congress in 1778 recommended that the states draft men from their militias for one year's service in the Continental army; this first national conscription was irregularly applied and failed to fill the Continental ranks.

paragraph_text: The Live Earth concert in Antarctica was held at Rothera Research Station, one in a series of Live Earth concerts that took place on July 7, 2007, in all seven continents. The band Nunatak performed as the lone act. Nunatak's performances, though performed in front of only 17 people, were broadcast all over the world. It was the first rock concert ever performed in Antarctica.

paragraph_text: Zealandia (/ ziːˈlændiə /), also known as the New Zealand continent or Tasmantis, is a nearly submerged mass of continental crust that sank after breaking away from Australia 60 -- 85 million years ago, having separated from Antarctica between 85 and 130 million years ago. It has variously been described as a continental fragment, a microcontinent and a continent. The name and concept for Zealandia were proposed by Bruce Luyendyk in 1995.

paragraph_text: Dreatin Glacier (, ‘Lednik Dreatin’ \'led-nik dre-a-'tin\) is the 12 km long and 7.5 km wide glacier on the northeast side of Detroit Plateau on Trinity Peninsula in Graham Land, Antarctica. It lies southwest of Znepole Ice Piedmont and north of Aitkenhead Glacier, draining the area southwest of Mount Bradley and north of Tufft Nunatak, and flowing southeastwards into Prince Gustav Channel, Weddell Sea west of Marmais Point.

paragraph_text: Grossenbacher Nunatak () is a nunatak at the southwest end of the Lyon Nunataks, Palmer Land, Antarctica, southwest of Holtet Nunatak. It was named by the Advisory Committee on Antarctic Names after Ernest P. Grossenbacher, an upper atmospheric physicist at Siple Station, 1970–71.

paragraph_text: The Cambrian is a major division of the geologic timescale that begins about 541.0 ± 1.0 Ma. Cambrian continents are thought to have resulted from the breakup of a Neoproterozoic supercontinent called Pannotia. The waters of the Cambrian period appear to have been widespread and shallow. Continental drift rates may have been anomalously high. Laurentia, Baltica and Siberia remained independent continents following the break-up of the supercontinent of Pannotia. Gondwana started to drift toward the South Pole. Panthalassa covered most of the southern hemisphere, and minor oceans included the Proto-Tethys Ocean, Iapetus Ocean and Khanty Ocean.

paragraph_text: Africa is the world's second largest and second most - populous continent (behind Asia in both categories). At about 30.3 million km (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area. With 1.2 billion people as of 2016, it accounts for about 16% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, the Isthmus of Suez and the Red Sea to the northeast, the Indian Ocean to the southeast and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos. It contains 54 fully recognised sovereign states (countries), nine territories and two de facto independent states with limited or no recognition. The majority of the continent and its countries are in the Northern Hemisphere, with a substantial portion and number of countries in the Southern Hemisphere.

paragraph_text: The Elliott Hills () are a group of low hills and nunataks, long, that mark the northwest end of the Gutenko Mountains, in central Palmer Land, Antarctica. They were mapped by the United States Geological Survey in 1974, and were named by the Advisory Committee on Antarctic Names for Lieutenant Commander David J. Elliott, U.S. Navy, Commander of LC-130 aircraft in aerial photographic and ice-sensing flights over extensive areas of the Antarctic continent during Operation Deep Freeze, 1970 and 1971.

paragraph_text: World Park Base was a non-governmental year-round Antarctic base located at Cape Evans on Ross Island in the Ross Dependency. The international environmental organization Greenpeace established World Park Base in 1987 in order to press its demand for the Antarctic Treaty nations to declare all of the continent of Antarctica a World Park. This would make the entire continent off-limits to commercial exploitation and pollution, and permit only limited scientific research. Greenpeace closed down and completely dismantled the base in 1992.

paragraph_text: The Holmes Hills () are a group of ridges and nunataks rising to about between Runcorn Glacier and Beaumont Glacier, bounded to the southwest by the Brennecke Nunataks, in south-central Palmer Land, Antarctica. They were mapped by the United States Geological Survey from aerial photographs taken by the U.S. Navy, 1966–69, and surveyed by the British Antarctic Survey, 1972–73. In association with the names of continental drift scientists grouped in this area, the hills were named by the Advisory Committee on Antarctic Names in 1978 after Scottish geologist Arthur Holmes, Professor of Geology at the University of Edinburgh, 1943–56.

paragraph_text: The continental margin, between the continental shelf and the abyssal plain, comprises a steep continental slope followed by the flatter continental rise. Sediment from the continent above cascades down the slope and accumulates as a pile of sediment at the base of the slope, called the continental rise. Extending as far as 500 km (310 mi) from the slope, it consists of thick sediments deposited by turbidity currents from the shelf and slope. The continental rise's gradient is intermediate between the slope and the shelf.

paragraph_text: Compared to the vigorous convergent plate mountain-building of the late Paleozoic, Mesozoic tectonic deformation was comparatively mild. The sole major Mesozoic orogeny occurred in what is now the Arctic, creating the Innuitian orogeny, the Brooks Range, the Verkhoyansk and Cherskiy Ranges in Siberia, and the Khingan Mountains in Manchuria. This orogeny was related to the opening of the Arctic Ocean and subduction of the North China and Siberian cratons under the Pacific Ocean. Nevertheless, the era featured the dramatic rifting of the supercontinent Pangaea. Pangaea gradually split into a northern continent, Laurasia, and a southern continent, Gondwana. This created the passive continental margin that characterizes most of the Atlantic coastline (such as along the U.S. East Coast) today.

paragraph_text: Emilio Marcos Palma was the first person born south of the 60th parallel south (the continental limit according to the Antarctic Treaty), as well as the first one born on the Antarctic mainland, in 1978 at Base Esperanza, on the tip of the Antarctic Peninsula; his parents were sent there along with seven other families by the Argentine government to determine if the continent was suitable for family life. In 1984, Juan Pablo Camacho was born at the Frei Montalva Station, becoming the first Chilean born in Antarctica. Several bases are now home to families with children attending schools at the station. As of 2009, eleven children were born in Antarctica (south of the 60th parallel south): eight at the Argentine Esperanza Base and three at the Chilean Frei Montalva Station.

paragraph_text: Due to its location at the South Pole, Antarctica receives relatively little solar radiation. This means that it is a very cold continent where water is mostly in the form of ice. Precipitation is low (most of Antarctica is a desert) and almost always in the form of snow, which accumulates and forms a giant ice sheet which covers the land. Parts of this ice sheet form moving glaciers known as ice streams, which flow towards the edges of the continent. Next to the continental shore are many ice shelves. These are floating extensions of outflowing glaciers from the continental ice mass. Offshore, temperatures are also low enough that ice is formed from seawater through most of the year. It is important to understand the various types of Antarctic ice to understand possible effects on sea levels and the implications of global cooling.

Question: Where is the continental limit of the continent encompassing Tufft Nunatak?
Answer: 60th parallel south