Complex sentence: The excavation of Mummy Cave yielded a nearly continuous succession of artifacts which span a period of over 9000 years, disposed in a manner that permitted dating in both relative terms through stratigraphy, as well as through radiocarbon dating to establish an absolute scale.
Split into simpler sentences: The excavation of Mummy Cave yielded a nearly continuous succession of artifacts, which span a period of over 9000 years. The artifacts were disposed in a manner that permitted dating in both relative terms through stratigraphy, as well as through radiocarbon dating to establish an absolute scale.