paragraph_text: Sea Mills is a suburb of the English port city of Bristol. It is situated some 3.5 miles (6 km) north-west of the city centre, towards the seaward end of the Avon Gorge, lying between the former villages of Shirehampton to the west, Westbury to the north and Stoke Bishop to the east, at the mouth of the River Trym where it joins the River Avon. Sea Mills forms part of the city ward of Kingsweston. Despite Roman remains, its place in the history of the area before the 20th Century is small.

paragraph_text: The São Lourenço River is a tributary of the Paraguay River within the Pantanal, an alluvial plain that spans portions of Brazil, Bolivia and Paraguay.

paragraph_text: The Spider Islands are a small archipelago in the north basin of Lake Winnipeg in Manitoba, Canada. The archipelago is situated near the eastern shoreline of the lake, north of the mouth of the Belanger River.

paragraph_text: The Mokihinui River's headwaters are located in the Glasgow Range and its mouth is on the Tasman Sea. There is little human habitation near the river: the localities of Mokihinui and Summerlea are near the river's mouth, Seddonville is a few kilometres up the river, and just prior to its terminus, State Highway 67 crosses the river outside Mokihinui. In the rugged back country behind Seddonville at the Mokihinui Forks, the river splits into two branches, north and south. The catchment of these two branches is a large inland basin of almost wholly unmodified forest.

paragraph_text: The river's source is Scotia Lake, a small lake east of Halfway Lake Provincial Park in Sudbury District. From there, it flows north and east, taking in two small tributaries and continuing to a point 20 kilometres southwest of the Ishpatina Ridge, where it turns south. After approximately 60 kilometres, the river flows into Lake Wanapitei in the northeastern portion of Greater Sudbury. At the south end of the lake, the river continues, flowing south until it joins the French River near the latter's mouth on Georgian Bay on Lake Huron. The river is approximately in length and is a popular wilderness canoeing route.

paragraph_text: Miravânia is a municipality in the north of the state of Minas Gerais in Brazil. As of 2007 the population was 4,708 in an area of 603 km². It is located on the left bank of the São Francisco River. It is connected by dirt road to São João das Missões by paved BR-135. The distance is 112 km. Neighboring municipalities are: Montalvânia, Manga, Cônego Marinho, and São João das Missões.

paragraph_text: The Ohlanga River is a river in KwaZulu-Natal, South Africa, which empties into the Indian Ocean just north of Umhlanga, KwaZulu-Natal, north of Durban. The river has extensive reed beds in the estuary at its mouth, which is only 7 km further southwest from the mouth of the Mdloti River. Presently this river is part of the Mvoti to Umzimkulu Water Management Area.

paragraph_text: The Abaeté River is a river of Minas Gerais state in southeastern Brazil. Its origin is in the Serra da Canastra, about north of São Gotardo and it passes through São Gonçalo do Abaeté. The river runs nearly north and empties into the São Francisco River, the confluence being located at . The Pontal area at the Abaeté River mouth is an important spawning site for fish.

paragraph_text: Vicente Nicolau de Mesquita (July 9, 1818 in São Lourenço, Portuguese Macau – March 20, 1880 in São Lourenço, Portuguese Macau) was an officer of the Portuguese Army in Macau. He is widely remembered for his role at the Portuguese attack of Baishaling, in 1849. He was the oldest of the five children of noted Macanese lawyer, Frederico Albino de Mesquita and Clara Esmeralda Carneiro - both Macau natives. He married twice; first to Balbina Maria da Silveira; second to his sister-in-law Carolina Maria Josefa da Silveira.

paragraph_text: Mummel River, a watercourse of the Manning River catchment, is located in the Northern Tablelands and Mid North Coast districts of New South Wales, Australia.

paragraph_text: The Carboniferous was a time of active mountain building, as the supercontinent Pangea came together. The southern continents remained tied together in the supercontinent Gondwana, which collided with North America-Europe (Laurussia) along the present line of eastern North America. This continental collision resulted in the Hercynian orogeny in Europe, and the Alleghenian orogeny in North America; it also extended the newly uplifted Appalachians southwestward as the Ouachita Mountains. In the same time frame, much of present eastern Eurasian plate welded itself to Europe along the line of the Ural mountains. There were two major oceans in the Carboniferous the Panthalassa and Paleo-Tethys. Other minor oceans were shrinking and eventually closed the Rheic Ocean (closed by the assembly of South and North America), the small, shallow Ural Ocean (which was closed by the collision of Baltica, and Siberia continents, creating the Ural Mountains) and Proto-Tethys Ocean.

paragraph_text: The Port of Brookings Harbor is the port authority for the city of Brookings, Oregon, United States, and serving the neighboring community of Harbor. The district covers from the mouth of the Chetco River south to the Oregon-California border, north to the mouth of the Pistol River, and east to the Curry-Josephine county line. The district is governed by a five-member commission elected at-large from the district population of approximately 16,000.

paragraph_text: Barcoongere River, a watercourse of the Wooli Wooli River catchment, is located in the Northern Rivers region of New South Wales, Australia.

paragraph_text: Paddys River, a watercourse of the Murray catchment within the Murray–Darling basin, is located in the Australian Alpine region of New South Wales, Australia.

paragraph_text: The Newark and New York Railroad was a passenger rail line that ran between Downtown Newark and the Communipaw Terminal at the mouth of the North River (Hudson River) in Jersey City, bridging the Hackensack River and Passaic River just north of their mouths at the Newark Bay in northeastern New Jersey. The Central Railroad of New Jersey operated it from its opening in 1869. Through operation ended in 1946; portions remained in use until 1967.

paragraph_text: Wallingat River, a watercourse of the Mid-Coast Council system, is located in the Mid North Coast district of New South Wales, Australia.

paragraph_text: The Paraguay River (Río Paraguay in Spanish, Rio Paraguai in Portuguese, Ysyry Paraguái in Guarani) is a major river in south-central South America, running through Brazil, Bolivia, Paraguay and Argentina. It flows about from its headwaters in the Brazilian state of Mato Grosso to its confluence with the Paraná River north of Corrientes and Resistencia.

paragraph_text: The Betka River rises south of in the Croajingolong National Park, just east of the Princes Highway, and flows generally northeast, then southeast, then east by north, before reaching its mouth with Bass Strait north of the Aerodrome in the Shire of East Gippsland. The river descends over its course.

paragraph_text: Maria River, a watercourse of the Hastings River catchment, is located in the Mid North Coast region of New South Wales, Australia.

paragraph_text: A significant body of water (referred to as the Central American Seaway) once separated the continents of North and South America, allowing the waters of the Pacific and Atlantic Oceans to mix freely. Beneath the surface, two plates of the Earth's crust were slowly colliding, forcing the Cocos Plate to slide under the Caribbean Plate. The pressure and heat caused by this collision led to the formation of underwater volcanoes, some of which grew large enough to form islands as early as 15 million years ago. Meanwhile, movement of the two tectonic plates was also pushing up the sea floor, eventually forcing some areas above sea level.

Question: When did a collision take place between North America, and the continent that holds the river with the São Lourenço as its mouth?
Answer: as early as 15 million years ago