infilling means infilled material. Lexicurio rates it Rare gem — a strength score of 84 out of 100.
Etymology
From infill + -ing and/or in- + filling.
noun
- infilled material“In central Shandong, Qizian Hill Cave (Yiyuan county) in the Tumen karst area yields fauna in infillings at several localities, and in the Xiaya Cave group, situated some 5-15 m above the valley floor, human remains are also known.”