1:45 PM - 3:15 PM
[O06-P31] Proposal for a new geosite "Hachinohe Marine Terrace" within the Sanriku Geopark.
Keywords:Environment, geology, Geoparks, marine terraces, sea level
Hachinohe-shi marine science museum MARIENTO, to which the MARIENTO "Chikyu" Tanken Club Sr. belongs, is located at the northern end of the Sanriku Geopark (Fig. 1). There are many terraces and some Gio sites in this area. Those guidebooks only give a poor description of how they are formed. Focusing on them, we propose a new Geo site " Hachinohe Marine Terrace ".
The following issues were obtained through research and review of materials to enhance the attractiveness of the Geopark.
1. Use volcanic ash on terraces to compare and age terraces.
2. Land uplift and sea-level change create multiple marine terraces.
3. The Taneichi and Takadate formations are the benchmark for comparison pairs over a wide area.
4. Measurements of the Sanriku coast over the last 100 years show subsidence.
5. After the 2011 Tohoku earthquake, the Sanriku coast subsided, followed by gradual uplift.
6. The relationship between major earthquakes and land uplift is low on the Sanriku Coast.
In this process, we considered marine terraces as evidence of past climate change, because sea-level change is attributed to climate change. It is very significant to learn about climate change, which has become a global issue, through Geopark activities.
So, we decided to propose a new Gio site that connects marine terraces with climate change. To promote the new Geo site, we set up viewpoints and walking routes, and created a geo-picture-story show. In this study, we expanded our knowledge about marine terraces, climate change and volcanic activity. We also realized that we live and benefit from a variable area. We would like to propose a new Geo-story based on what I learned here, spread it in different areas and use it for disaster prevention and mitigation.
The following issues were obtained through research and review of materials to enhance the attractiveness of the Geopark.
1. Use volcanic ash on terraces to compare and age terraces.
2. Land uplift and sea-level change create multiple marine terraces.
3. The Taneichi and Takadate formations are the benchmark for comparison pairs over a wide area.
4. Measurements of the Sanriku coast over the last 100 years show subsidence.
5. After the 2011 Tohoku earthquake, the Sanriku coast subsided, followed by gradual uplift.
6. The relationship between major earthquakes and land uplift is low on the Sanriku Coast.
In this process, we considered marine terraces as evidence of past climate change, because sea-level change is attributed to climate change. It is very significant to learn about climate change, which has become a global issue, through Geopark activities.
So, we decided to propose a new Gio site that connects marine terraces with climate change. To promote the new Geo site, we set up viewpoints and walking routes, and created a geo-picture-story show. In this study, we expanded our knowledge about marine terraces, climate change and volcanic activity. We also realized that we live and benefit from a variable area. We would like to propose a new Geo-story based on what I learned here, spread it in different areas and use it for disaster prevention and mitigation.