In 1807 Greenough's interest in science in general, and geology in particular, increased : he joined a number of eminent scientific and cultural societies and he was elected fellow of the Royal Society. He also became associated with a group of mineralogists to which Davy referred in a letter to William Pepys, dated 13 November 1807, when he said 'We are forming a little talking Geological Club'. This club rapidly developed into a learned society devoted to geology and Greenough became the chief founder with others of the Geological Society of London. He was the first chairman of that Society, and in 1811, when it was more regularly constituted, he was the first president. In this capacity he served on two subsequent occasions, and did much to promote the advancement of geology.