11Hensey, Robert, Pádraig Meehan, Marion Dowd, and Sam Moore. "A Century of archaeology—historical excavation and modern research at the Carrowkeel passage tombs, County Sligo." Proceedings of the Royal Irish Academy. Section C: Archaeology, Celtic Studies, History, Linguistics, Literature 114 (2014): 1-31.
Archaeologists now understand Carrowkeel to be for the most part a Middle Neolithic monument, not one of Bronze Age origin. While this presumption was until recently based on comparisons to other sites, recent discoveries have confirmed the Neolithic origin of the monuments using radiocarbon dating of bone fragments from the tombs.