Description
上田市越戸（こうど）産。今から1500万年ほど前にフォッサマグナの海に堆積した別所層の泥岩（でいがん）中から産出する。石器時代の石槍のような形をしている。成分は方解石と同じ炭酸カルシウムが主。地層ができるときに同時にできたものであるといわれているが、くわしい成分はまだはっきりしていない。（『長野県地学図鑑』より）
Data source
Ueda City Museum Collection
Ueda City Museum's collection database
Contents holder/Provider
Aggregator
Ueda City
Ueda City is a core city in eastern Nagano Prefecture with a population of 160,000. Under the catchphrase, "A city of health and happiness where people smile and lead to a bright future," the city aims to "create a city where citizens play a leading role," "create a safe, secure, and comfortable environment," "create a city where everyone can work actively and industries can grow," "create a city where people can support each other and live healthy," "create a city where people can learn and develop a rich spirit throughout their lives," and "create a city where culture is nurtured and people's character is enhanced through exchange and cooperation.
Last updated
March 3, 2025