Published on March 29, 2015
This book describes Izu's distinctive history in which its foundation continued to drift northward, while it was born and grew as a result of submarine eruptions in the sea far south of it, until it finally became its current shape of peninsula after its colission with the Japanese main island. In addition, the book also introduces current ongoing earthquakes and volcanic activities in Izu and on its periphery and discusses how to coexist with the earth with a focus on their forecasts and disaster damage control issues.
About the Author
Masato Koyama is a professor at the Center for Integrated Research and Education of Natural Hazards (CIREN) of Shizuoka University and at the Faculty of Education of Shizuoka University. Professor Koyama specializes in volcanology and mitigation of earthquake and volcanic disasters. He was born in the city of Hamamatsu, Shizuoka, in 1959. Koyama obtained a doctoral degree in science (geology) from the University of Tokyo. Koyama held posts as a director of the Volcanological Society of Japan and a member of the Committee for Hazard Maps of Fuji Volcano. Currently, he is a member of the Volcano Disaster Management Council for Izu Tobu Volcano Group and the Izu Subcommittee of the Coordinating Committee for Prediction of Volcanic Eruption and also the advisor to the Izu Peninsula Geopark Promotion Council. Koyama has continued geological studies of Izu for more than thirty years since his university graduation studies.
Table of Contents
Introduction
1. Izu came from the South
2. The geological history of the Izu Peninsula
3. How to measure the geologic age of strata
Chapter 1: The period of submarine volcanoes
4. The Nishina Group (1): Submarine lava flow
5. The Nishina Group (2): Submarine volcanic debris flow
6. The Nishina Group (3): Strange characteristics of rock
7. The Yugashima Group (1): Strata along the valleys
8. The Yugashima Group (2): Turbidity current
9. The Yugashima Group (3): Green rocks
10. The Yugashima Group (4): Fossils of the South Seas
11. The Yugashima Group (5): What happened 10 million years ago?
12. The Shirahama Group (1): The Pliocene Coast
13. The Shirahama Group (2): The uplift of submarine volcanoes
14. The Shirahama Group (3): Beautiful strata in Dogashima: Subaqueous volcaniclastic flows
15. The Shirahama Group (4): Beautiful strata in Dogashima: Chilled bomb
16. The Shirahama Group (5): White cliff
17. The Shirahama Group (6): Volcanic neck
18. The Shirahama Group (7): First land
Chapter 2: The path to a peninsula
19. Drilling into the sea floor around Izu (1): Deep-sea drillship
20. Drilling into the sea floor around Izu (2): International joint study
21. Drilling into the sea floor around Izu (3): The northward drift of plates
22. Izu’s collision with the Japanese main island (1): Closed channel: The Ashigara Group
23. Izu’s collision with the Japanese main island (2): Closed channel: Landfill and uplift
24. Izu’s collision with the Japanese main island (3): The last sea
25. Izu’s collision with the Japanese main island (4): The indentation of Izu
26. Diving in the bottom of the Suruga Bay (1): SHINKAI 2000
27. Diving in the bottom of the Suruga Bay (2): The Dive 579 launched
28. Diving in the bottom of the Suruga Bay (3): Sinking sea floor
Chapter 3: The period of terrestrial large volcanoes
29. A long range of multiple volcanoes: Polygenetic volcano
30. A long range of multiple volcanoes: Lost summit
31. Yugawara Volcano, Taga Volcano and Usami Volcano
32. Amagi Volcano and Tenshi Volcano
33. Daruma Volcano, Ita Volcano and Osezaki Volcano
34. Tanaba Volcano, Nekko Volcano and Chokuro Volcano
35. Jaishi Volcano and Nanzaki Volcano
36. Volcano that created glass
37. Obsidian in Izu
Chapter 4: The period of the Izu Tobu Volcano Group
38. A group of small volcanoes
39. Pumice and volcanic ash from Hakone
40. Lake Ippekiko and Numaike
41. Umenokidaira
42. Kadono and Ogi
43. What a volcano chain means
44. The largest eruption of Hakone Volcano
45. A volcano that created the Kawazu Nanadaru Falls
46. Hachikuboyama and the Jorennotaki Fall
47. The eruption of Fuji Volcano and Izu
48. Omuroyama (1): Scoria cone and crater
49. Omuroyama (2): Lava outlet
50. Omuroyama (3): A dammed lake and lava coast
51. Omuroyama (4): Pothole and scoria raft
52. Kawagodaira (1): Lava flow and pyroclastic flow
53. Kawagodaira (2): The entire process of eruption
54. Kawagodaira (3): Horrible eruption
55. Iwanoyama- Ioyama volcano chain
56. A summary of eruptive history (1): Locations of eruption and magma types
57. A summary of eruptive history (2): Serious future
58. A summary of eruptive history (3): Doughnut-shaped structure
Chapter 5: The living earth of Izu (earthquakes and crustal movement)
59. The current situaiton surrounding Izu in terms of earth science
60. The Tokai Earthquake, the Nankai Earthquake and the Kanto Earthquake
61. The West Kanagawa Prefecture Earthquake
62. The Tanna Fault (1): Disconnected ravines
63. The Tanna Fault (2): The Kita Izu Earthquake and trench excavation
64. The Tanna Fault (3): The past and the future
65. A country of active faults
66. The mystery of tectonic rotation: Unusual fault distribution
67. The mystery of tectonic rotation: The mechanism of rotation
68. Coastal landforms tell
69. A peninsula inclined to the west
Chapter 6: The living earth of Izu (magmatism)
70. The genealogy of volcano deities
71. The illusion of eruption
72. Earthquake swarms in 1930
73. From 1930 to 1978
74. The Off-Ito Submarine Eruption of 1989 (1): The process to eruption
75. The Off-Ito Submarine Eruption of 1989 (2): Volcanic tremor and eruption
76. The Off-Ito Submarine Eruption (3): The shock of eruption
77. The Off-Ito Submarine Eruption of 1989 (4): Given time for preparation
Chapter 7: Coexisting with the earth
78. Predicting magmatism (1): Success in predicting its start
79. Predicting magmatism (2): Predicting scale and end
80. Predicting magmatism (3): Volcano monitoring and disaster damage control system
81. Predicting magmatism (4): Magmatic activity scenario
82. Learning volcanoes
83. The blessings of volcano (1): Volcanoes created terrestrial areas
84. The blessings of volcano (2): Volcanoes create water sources
85. The blessings of volcano (3): Volcanoes produce stone and tourist resources
86. The dream of geopark (1): Mother earth
87. The dream of geopark (2): The assets of geopark
88. The dream of geopark (3): The current situation of Izu Peninsula Geopark
Related links:
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