Home › Authors › John Semple Jackson 👤 John Semple Jackson b. 1920 – d. 1991 · 1 book Biography John S. Jackson (21 February 1920 – 19 November 1991) was an Irish geologist and environmentalist, and is believed to be the first environmental consultant in Ireland.[1] -Wikipedia Books by John Semple Jackson The Upper Carboniferous (Namur The Upper Carboniferous (Namurian and Westphalian) of Kingscourt, Ireland 1965