Lincolnshire reaching between 4.7 and 5.3 on the Richter magnitude scale; it was one of the largest earthquakes to affect Britain in recent years. Lincolnshire is home to Woolsthorpe Manor, birthplace and home of Sir Isaac Newton. He attended The King's School, Grantham. Its library has preserved his signature, carved into a window sill when he was a youth. Bedrock in Lincolnshire features Jurassic limestone (near Lincoln) and Cretaceous chalk (north-east). For much of prehistory, Lincolnshire was under tropical seas, and most fossils found in the county are marine invertebrates. Marine vertebrates have also been found including ichthyosaurus and plesiosaur .
Lincolnshire Day Newton – scientist, Alfred Lord Tennyson - Poet Laureate, Baroness Thatcher – Prime Minister, Matthew Flinders – explorer, Joseph Banks – explorer and botanist, George Boole – mathematician, Tony Jacklin CBE – golfer, Dame Joan Plowright – actress and Jim Broadbent – actor. Lincolnshire Day is supported by county businesses and organisations including BBC Lincolnshire, Lincolnshire Co-operative, The Lincolnite, Lincolnshire Business, the Lincolnshire Echo, Lincolnshire Tourism, Lincoln Cathedral, Lincolnshire Life, Lincoln BIG, Tastes of Lincolnshire, Lincolnshire County Council, Shooting Star PR, POP Design and the Lincolnshire Sports Partnership. Lincolnshire Day Lincolnshire Day is celebrated every year on 1 October and