31. Largely working alone, he had made geological investigations over and had produced the promised geological map . 32. In that capacity, he was responsible for a multitude of geological maps of his native Swabia. 33. He decided to make a geological survey of Gibraltar that resulted in a detailed geological map . 34. He created the first geological map of England during the late 1790s and early 19th century. 35. Within the 20th Century there were three statewide geological maps produced prior to the 1976 map. 36. In 1815 he published the first geological map of Britain, based on a John Cary map. 37. The ministry has submitted a proposal, helped by the Asia Development Bank, for a detailed geological map . 38. He made a couple of geological maps . 39. In 1809 he made the earliest attempt at a geological map of the United States of America. 40. The first geological map of the U . S . was produced in 1809 by William Maclure.
