Foremost results from an early geological survey of Yesso
This edition presents how a season’s fieldwork focused on a few key points in the island’s southwest, combining fossils, mineral deposits, and topographic mapping to build a clear picture of the land and its resources. It explains the methods, the people involved, and what the team hoped to learn for the education of Japanese youth and future exploration.
The report outlines the scope of work, the value of quantitative topography, and the practical lessons drawn from surveying both surface features and underground deposits. It discusses coal fields near the Ishcari and Horumui areas, the grade and location of multiple beds, and the possibilities for future mining and transportation. It also covers magnetic iron sand on the island’s shores, including historical iron works and the practicalities of mining and processing. In addition, it surveys oil-rich deposits along several rivers and coastlines, with notes on the extent and feasibility of wells and the implications for local industry.
- How the season’s work was planned and carried out, including the topographical method and its advantages.
- What kinds of deposits were found (coal, iron sand, oil) and where they occur.
- The roles of Japanese and American staff, and how the team managed surveying and fieldwork.
- Practical considerations for future development, such as harbor sites, transport routes, and mining potential.
Ideal for readers of practical field studies, early geology, and government surveys, this edition helps place the season’s discoveries in context and shows how map-based analysis can reveal valuable natural resources.