paragraph_text: Oceanic crust is continuously being created at mid-ocean ridges. As plates diverge at these ridges, magma rises into the upper mantle and crust. As it moves away from the ridge, the lithosphere becomes cooler and denser, and sediment gradually builds on top of it. The youngest oceanic lithosphere is at the oceanic ridges, and it gets progressively older away from the ridges.

paragraph_text: The Caribbean (/ ˌkærɪˈbiːən / or / kəˈrɪbiən /, local most common pronunciation / ˈkærɪˌbiːən /) is a region that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Sea and the North Atlantic Ocean) and the surrounding coasts. The region is southeast of the Gulf of Mexico and the North American mainland, east of Central America, and north of South America.

paragraph_text: Demi Lovato as Smurfette, a girl smurf who was created by the wizard Gargamel. Surrounded by male Smurfs who each have a clear role in the village, she becomes curious about her own purpose.

paragraph_text: Antarctica (US English i/æntˈɑːrktɪkə/, UK English /ænˈtɑːktɪkə/ or /ænˈtɑːtɪkə/ or /ænˈɑːtɪkə/)[Note 1] is Earth's southernmost continent, containing the geographic South Pole. It is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14,000,000 square kilometres (5,400,000 square miles), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 km (1.2 mi; 6,200 ft) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula.

paragraph_text: Central Coast Regional District is a regional district in British Columbia, Canada. It has a total land area of 24,559.5 km² (9,482.5 sq mi). When it was created in 1968, it was known as the Ocean Falls Regional District, named for the then-largest town in the region, the company town of Ocean Falls, which has since become a ghost town. The district name was confirmed in 1974, but changed to Central Coast Regional District in 1976.

paragraph_text: Iselin Seamount is a seamount in the Southern Ocean off Antarctica. It was named for the research ship "Iselin II" of the Woods Hole Oceanographic Institute, the name being approved by the Advisory Committee for Undersea Features in February 1964.

paragraph_text: The United States Exploring Expedition of 1838–1842 was an exploring and surveying expedition of the Pacific Ocean and surrounding lands conducted by the United States. The original appointed commanding officer was Commodore Thomas ap Catesby Jones. Funding for the original expedition was requested by President John Quincy Adams in 1828, however, Congress would not implement funding until eight years later. In May 1836, the oceanic exploration voyage was finally authorized by Congress and created by President Andrew Jackson.

paragraph_text: Mount Washington is a home rule-class city in northeast Bullitt County, Kentucky, in the United States. The population was 9,117 at the 2010 census. The city is one of several surrounding Louisville that have experienced a sharp rise in population in the past three decades, becoming a commuter town.

paragraph_text: Antarctica is colder than the Arctic for three reasons. First, much of the continent is more than 3,000 m (9,800 ft) above sea level, and temperature decreases with elevation in the troposphere. Second, the Arctic Ocean covers the north polar zone: the ocean's relative warmth is transferred through the icepack and prevents temperatures in the Arctic regions from reaching the extremes typical of the land surface of Antarctica. Third, the Earth is at aphelion in July (i.e., the Earth is farthest from the Sun in the Antarctic winter), and the Earth is at perihelion in January (i.e., the Earth is closest to the Sun in the Antarctic summer). The orbital distance contributes to a colder Antarctic winter (and a warmer Antarctic summer) but the first two effects have more impact.

paragraph_text: ``Land mass ''refers to the total surface area of the land of a geographical region or country (which may include discontinuous pieces of land such as islands). It is written as two words to distinguish it from the usage`` landmass'', the contiguous area of land surrounded by ocean. Earth's total land mass is approximately 148,939,063.133 km (57,505,693.767 sq mi) which is about 29.2% of its total surface. Water covers approximately 70.8% of Earth's surface, mainly in the form of oceans and ice formations.

paragraph_text: The Indo - Australian Plate is a major tectonic plate that includes the continent of Australia and surrounding ocean, and extends northwest to include the Indian subcontinent and adjacent waters. It was formed by the fusion of Indian and Australian plates 43 million years ago. Recent studies, and seismic events such as the 2012 Indian Ocean earthquakes, suggest that the Indo - Australian Plate may have broken up into two or three separate plates due primarily to stresses induced by the collision of the Indo - Australian Plate with Eurasia along the Himalayas, and that the Indian Plate and Australian Plate have been separate since at least 3 million years ago.

paragraph_text: The Walpole Wilderness Area is a group of conservation reserves on the south coast of Western Australia. The area includes vast tracts of jarrah, tingle and karri forests surrounding granite peaks, rivers, heathlands, and wetlands. Coastal features include inlets and sandy beaches, sheer cliffs and the Southern Ocean.

paragraph_text: The unofficial flag of Bequia is composed of three black waves, which stand for Bequia Channel, the Caribbean Sea and the Atlantic Ocean; and a black humpback whale, Bequia's main icon, surrounded by a black-and-white border around the flag.

paragraph_text: Positioned asymmetrically around the South Pole and largely south of the Antarctic Circle, Antarctica is the southernmost continent and is surrounded by the Southern Ocean; alternatively, it may be considered to be surrounded by the southern Pacific, Atlantic, and Indian Oceans, or by the southern waters of the World Ocean. It covers more than 14,000,000 km2 (5,400,000 sq mi), making it the fifth-largest continent, about 1.3 times as large as Europe. The coastline measures 17,968 km (11,165 mi) and is mostly characterized by ice formations, as the following table shows:

paragraph_text: The Coolangatta Estate at Shoalhaven Heads was established in 1822 by Alexander Berry on the South Coast of New South Wales, Australia. Coolangatta Estate is located on the northern bank of the Shoalhaven River, in the foothills of a mountain called Coolangatta. The word 'Coolangatta' is from an aboriginal word which means either "splendid view" or "good lookout". The estate today is in a picturesque setting overlooking the ocean and surrounded by vineyards.

paragraph_text: During the Eocene (56 million years ago - 33.9 million years ago), the continents continued to drift toward their present positions. At the beginning of the period, Australia and Antarctica remained connected, and warm equatorial currents mixed with colder Antarctic waters, distributing the heat around the world and keeping global temperatures high. But when Australia split from the southern continent around 45 Ma, the warm equatorial currents were deflected away from Antarctica, and an isolated cold water channel developed between the two continents. The Antarctic region cooled down, and the ocean surrounding Antarctica began to freeze, sending cold water and ice floes north, reinforcing the cooling. The present pattern of ice ages began about 40 million years ago.[citation needed]

paragraph_text: Basalt Lake is a small freshwater lake surrounded by three basalt outcrops with ‘organ-pipe’ formations in their rocks, situated in the central part of the ice-free Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. and draining through a 1.6 km stream southwards into Bransfield Strait.

paragraph_text: By way of his voyages in the 1770s, Captain James Cook proved that waters encompassed the southern latitudes of the globe. Since then, geographers have disagreed on the Southern Ocean's northern boundary or even existence, considering the waters as various parts of the Pacific, Atlantic, and Indian Oceans, instead. However, according to Commodore John Leech of the International Hydrographic Organization (IHO), this situation has no scientific sense since it has different ecosystem and life from the three oceans mentioned before and is located on a southern portion of Earth, hence the name of an ocean. This remains the current official policy of the IHO, since a 2000 revision of its definitions including the Southern Ocean as the waters south of the 60th parallel has not yet been adopted. Others regard the seasonally - fluctuating Antarctic Convergence as the natural boundary.

paragraph_text: The West Indies or the Caribbean Basin is a region of the North Atlantic Ocean in the Caribbean that includes the island countries and surrounding waters of three major archipelagoes: the Greater Antilles, the Lesser Antilles and the Lucayan Archipelago.

paragraph_text: Southampton's strong economy is promoting redevelopment, and major projects are proposed, including the city's first skyscrapers on the waterfront. The three towers proposed will stand 23 storeys high and will be surrounded by smaller apartment blocks, office blocks and shops. There are also plans for a 15-storey hotel at the Ocean Village marina, and a 21-storey hotel on the north eastern corner of the city centre, as part of a £100m development.

Question: When did the ocean surrounding Antarctica become a thing?
Answer: the 1770s