11. The Northern California center studies earthquakes, coastal erosion, volcanoes and wetlands and creates geologic maps . 12. His geologic maps cover an area of 10, 500 km 2 in Hawaii and California. 13. Each year since 1915, AZGS has released geologic maps , formal reports, and other geology-related publications. 14. As a result, it is difficult to create an accurate geologic map of the area. 15. The angle of dip is generally included on a geologic map without the degree sign. 16. In 1799 Smith produced the first large scale geologic map of the area around Bath, Somerset. 17. Darton was an expert at geological photography, a noted geologic map maker, and a paleontological discoveries. 18. A fault trace is also the line commonly plotted on geologic maps to represent a fault. 19. One photograph of the Zagros Mountains revealed greater detail than the official geologic map of Iran. 20. In 1974, he and Helen Beikman produced the " Geologic Map of the United States ".
