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 .
Shadow Cabinet of Margaret Thatcher Shadow Cabinet of Margaret Thatcher Margaret Thatcher became the first female Leader of the Conservative Party and Leader of the Opposition after winning the 1975 leadership election, the first Conservative leadership election where the post was not vacant. A rule change to enable the election was largely prompted by dissatisfaction with the incumbent leader, Edward Heath, who had lost three of four general elections as leader, including two in 1974. After announcing her first Shadow Cabinet in February 1975, she reshuffled it twice: in January and November 1976. Minor subsequent changes were necessary to respond to various circumstances. Thatcher's Shadow