paragraph_text: Splitrock is an abandoned townsite in Beaver Bay Township, Lake County, Minnesota, United States; located at the mouth of the Split Rock River.

paragraph_text: Entiako Provincial Park and Protected Area is a provincial park in British Columbia, Canada, located on the south flank of the Nechako River watercourse . It was formerly part of Tweedsmuir Provincial Park until that park was broken up; its sibling parks from that change are Tweedsmuir North Provincial Park and Protected Area and Tweedsmuir South Provincial Park.

paragraph_text: The geological history of Europe traces back to the formation of the Baltic Shield (Fennoscandia) and the Sarmatian craton, both around 2.25 billion years ago, followed by the Volgo -- Uralia shield, the three together leading to the East European craton (≈ Baltica) which became a part of the supercontinent Columbia. Around 1.1 billion years ago, Baltica and Arctica (as part of the Laurentia block) became joined to Rodinia, later resplitting around 550 million years ago to reform as Baltica. Around 440 million years ago Euramerica was formed from Baltica and Laurentia; a further joining with Gondwana then leading to the formation of Pangea. Around 190 million years ago, Gondwana and Laurasia split apart due to the widening of the Atlantic Ocean. Finally, and very soon afterwards, Laurasia itself split up again, into Laurentia (North America) and the Eurasian continent. The land connection between the two persisted for a considerable time, via Greenland, leading to interchange of animal species. From around 50 million years ago, rising and falling sea levels have determined the actual shape of Europe, and its connections with continents such as Asia. Europe's present shape dates to the late Tertiary period about five million years ago.

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: 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: A First Fleet of British ships arrived at Botany Bay in January 1788 to establish a penal colony, the first colony on the Australian mainland. In the century that followed, the British established other colonies on the continent, and European explorers ventured into its interior. Indigenous Australians were greatly weakened and their numbers diminished by introduced diseases and conflict with the colonists during this period.

paragraph_text: Today both the Papireto river and the Kemonia are covered up by buildings. However, the shape of the former watercourses can still be recognised today, because the streets that were built on them follow their shapes. Today the only waterway not drained yet is the Oreto river that divides the downtown of the city from the western uptown and the industrial districts. In the basins there were, though, many seasonal torrents that helped formed swampy plains, reclaimed during history; a good example of which can be found in the borough of Mondello.

paragraph_text: The river has its sources in the eastern part of Belgorod Oblast, on the southeastern slopes of the Central Russian Upland. It flows in a northeasterly direction, and joins the Don some west of the town of Liski in Voronezh Oblast.

paragraph_text: The Bloukrans River is a short river located in the Tsitsikamma region of the Garden Route, South Africa. It is located on the border between the Western Cape and Eastern Cape provinces. The river mouth is located east of Nature's Valley, the Bloukrans Bridge spans the river near the mouth and the Bloukrans Pass is close by. The river originates near Peak Formosa in the Plettenberg Bay region.

paragraph_text: A First Fleet of British ships arrived at Botany Bay in January 1788 to establish a penal colony. In the century that followed, the British established other colonies on the continent, and European explorers ventured into its interior. Indigenous Australians were greatly weakened and their numbers diminished by introduced diseases and conflict with the colonists during this period.

paragraph_text: Moody Brook is a small watercourse that flows into Stanley Harbour on East Falkland, Falkland Islands. It is near Stanley, just to the north west, and was formerly the location of the town barracks, which were attacked in Operation Azul, the 1982 Argentine Invasion of the Falkland Islands.

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: Amesbury is a city in Essex County, Massachusetts, located on the left bank of the Merrimack River near its mouth, upstream from Salisbury and across the river from Newburyport and West Newbury. The population was 16,283 at the 2010 census. A former farming and mill town, Amesbury is today largely residential. It is one of the two northernmost towns in Massachusetts (the other being neighboring Salisbury).

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: Berowra Creek is a remote northern suburb of Sydney, in the state of New South Wales, Australia. It is located near and around the 30 km long Berowra Creek watercourse, is spread across several different waterfront locations, and borders Hornsby Shire. Access to Berowra Creek is via boat only.

paragraph_text: The Battle of the Tanais River in 373 AD between the Huns and the Alans, was fought on the traditional border between Asia and Europe. The Huns were victorious.

paragraph_text: The Old Enon Road Stone Arch Culvert is a historic limestone bridge in southern Clark County, Ohio, United States. It carries Rocky Point Road over Mud Run, a tributary of the Mad River, just west of its intersection with Old Mill Road. Located approximately east of Enon in eastern Mad River Township, it was constructed under the leadership of stonemason Samuel Taylor in 1871. In the past, the region was dotten with stone culverts, which were built in the nineteenth and early twentieth centuries to carry roads over small watercourses. Today, few stone culverts survive in Ohio; the Old Enon Road culvert is both Clark County's only such bridge in daily use and the oldest bridge of any type still open to daily traffic throughout the county.

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 horse evolved in the Americas, but became extinct between 8,000 and 12,000 years ago. When the Spanish arrived on the American mainland in the 16th century, they brought horses with them and re-established the animals on the continent.

paragraph_text: The United States Coast Guard Station Belle Isle is located on Belle Isle, Michigan, near Detroit and the mouth of the Detroit River.

Question: When did the continent that holds the watercourse that is the mouth of the Tikhaya Sosna, arrive at its current location?
Answer: the late Tertiary period about five million years ago