Ma3 岩地区（いわちく）
～龍門寺には１つの石から塔身をつくった五層塔がある～
Iwa Masonry Area (in Manazuru)
ジオサイト解説
南側の平台は白磯溶岩グループがつくる溶岩台地で、海岸には江戸時代などの採石の痕跡が見られます。北側の海食崖には岩溶岩グループの溶岩とその下位の火砕丘の断面が見られます。火砕丘の断面は如来寺跡の境内洞窟の内部で間近に見ることができましたが、現在は崩落の危険があるため立ち入り禁止になっています。
岩地区は白磯溶岩グループと岩溶岩グループの間の低地に形成された集落で、石工が多く住み民家の石垣などに様々に加工された石材を見ることができます。縁起物である鮑は特に武家には「打鮑、勝栗、昆布」の三肴のひとつとして貴ばれたこともあり、岩村と真鶴村の鮑漁は戦国時代の記録にも残されています。江戸時代には小田原藩主稲葉正則が岩村の鮑三二一貝を江戸の将軍に献上しています。
The Iwa Masonry Area is located northwest of Manazuru Station; volcanic activity about 220 to 180 thousand years ago formed a cinder cone, which can be observed in a cave of the former Nyorai-ji Temple.
Many stoneworkers lived in this area, and their work is evident in the many stone walls of private homes in the area.
Hiradai, located in the south of the Iwa Masonry Area, is a highland created by a lava flow about 180 to 170 thousand years ago. The beach of the Iwa Masonry Area was highly deformed by quarrying in the 17th century. You can see the remains of Edo-period (17th century) quarrying on the beach.
Many stoneworkers lived in this area, and their work is evident in the many stone walls of private homes in the area.
Hiradai, located in the south of the Iwa Masonry Area, is a highland created by a lava flow about 180 to 170 thousand years ago. The beach of the Iwa Masonry Area was highly deformed by quarrying in the 17th century. You can see the remains of Edo-period (17th century) quarrying on the beach.