Petrography of the sand fraction and detrital zircon U/Pb isotope data were collected from Byrd Glacier moraines and central/western Ross Sea till in order to trace material transported from the Byrd Glacier into the Ross embayment. Petrographic analysis of Byrd Glacier samples show a wide variety of mineral and lithic fragments. Quartz, feldspar, greywacke, igneous (mafic, intermediate, and felsic), and metamorphic fragments were observed in different percentages among the sites. The U/Pb ages of zircons from Byrd Glacier show a dominant population of Ross to Pan-African ages with varying populations of older (Grenville to Archean) zircons. The Ross Sea samples have a variety of mineral and lithic fragments as well and include a dominant population of greywacke lithic fragments. Whereas most Ross Sea till samples contain a complex mix of mineral and lithic fragments, one depth interval from each of the three cores is dominated (>85%) by greywacke.