Passage: The Falkland Islands have a land area of 4,700 square miles (12,000 km2) and a coastline estimated at 800 miles (1,300 km). The archipelago consists of two main islands, West Falkland and East Falkland, and about 776 smaller islands. The islands are predominantly mountainous and hilly, with the major exception being the depressed plains of Lafonia (a peninsula forming the southern part of East Falkland). The Falklands consists of continental crust fragments resulting from the break-up of Gondwana and the opening of the South Atlantic that began 130 million years ago. The islands are located in the South Atlantic Ocean, on the Patagonian Shelf, about 300 miles (480 km) east of Patagonia in southern Argentina.The Falklands' approximate location is latitude 51°40′ – 53°00′ S and longitude 57°40′ – 62°00′ W. The archipelago's two main islands are separated by the Falkland Sound, and its deep coastal indentations form natural harbours. East Falkland houses Stanley (the capital and largest settlement), the UK military base at RAF Mount Pleasant, and the archipelago's highest point: Mount Usborne, at 2,313 feet (705 m). Outside of these significant settlements is the area colloquially known as "Camp", which is derived from the Spanish term for countryside (Campo).The climate of the islands is cold, windy and humid maritime. Variability of daily weather is typical throughout the archipelago. Rainfall is common over half of the year, averaging 610 millimetres (24 in) in Stanley, and sporadic light snowfall occurs nearly all year. The temperature has historically stayed between 21.1 and −11.1 °C (70.0 and 12.0 °F) in Stanley, with mean monthly temperatures varying from 9 °C (48 °F) early in the year to −1 °C (30 °F) in July. Strong westerly winds and cloudy skies are common. Although numerous storms are recorded each month, conditions are normally calm.

Question: How many years ago did the opening of the South Atlantic begin?
130 million years