Definition of "infilling"

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.

1994, F. Clark Howell, “A Chronostratigraphic and Taxonomic Framework of the Origins of Modern Humans”, in Matthew H. Nitecki, Doris V. Nitecki, editors, Origins of Anatomically Modern Humans‎, Plenum Press, page 268