noun
Kantō loam formation
Geological term for the volcanic ash soil layer covering the Kantō region; used in earth science and construction contexts.
関東ローム層は、関東平野に広く分布する火山灰土壌です。
The Kantō loam formation is a volcanic ash soil widely distributed across the Kantō Plain.
Compound of 関東 (Kantō region) + ローム (loam, from English) + 層 (layer, stratum).