Simplify the following text for a Grade 9 native English-speaking person.
Original: Sir Charles Lyell , 1st Baronet , Kt FRS ( 14 November 1797 â `` 22 February 1875 ) was a British lawyer and the foremost geologist of his day .
Simplified: Sir Charles Lyell , 1st Baronet , ( 14 November 1797 â `` 22 February 1875 ) was a British geologist .