Tropic of Cancer (0.468″) of latitude, or 15 metres, per year (it was at exactly 23° 27′N in 1917 and will be at 23° 26'N in 2045). See axial tilt and circles of latitude for further information. North of the tropic are the subtropics and the North Temperate Zone. The equivalent line of latitude south of the Equator is called the Tropic of Capricorn, and the region between the two, centered on the Equator, is the tropics. There are approximately 13 hours, 35 minutes of daylight during the summer solstice. During the winter solstice, there are 10 hours, 41 minutes of daylight. Starting
Bowerchalke the equator, the latitude of present-day Argentina. 'Proto-Bowerchalke' and the rest of England and Wales are part of Avalonia, a micro-continent that broke away from the southern landmass, and was 50 degrees south of the equator about 500 mya. It joined with Baltica just south of the equator 400 mya, and was crushed between Baltica, and Laurasia (North America), and Gondwanaland (Africa, Australia, Antarctica and South America) 350 mya whilst near the equator (Variscan orogeny). Avalonia was landlocked and buffeted within Pangaea just north of the equator 270 mya, and became part of a desert in the northern tropics 230