boulder r clay soil泥砾土
boulder-clay泥砾
boulder r clay泥砾土
Hessle boulder clay赫塞尔泥砾
red boulder clay红色泥砾
boulder clay soil泥砾土
boulder clay soils泥粒土壤
glacial boulder clay冰川粘土
chaotic boulder clay混杂漂砾粘土
N(名词) an unstratified glacial deposit consisting of fine clay, boulders, and pebbles 冰砾土 → see also till