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 .
Margaret Thatcher the Islands in January 1983, six months after the end of the Falklands War in June 1982. Thatcher became a member of the Lords in 1992 with a life peerage as Baroness Thatcher, of Kesteven in the County of Lincolnshire. Subsequently, the College of Arms granted her usage of a personal coat of arms; she was allowed to revise these arms upon her appointment as Lady of the Order of the Garter (LG) in 1995, the highest order of chivalry for women. In the US, Thatcher received the Ronald Reagan Freedom Award, and was later designated Patron of The Heritage