For my doctoral research, I will work in the McMaster Archaeological XRF Lab where I will study X-ray spectroscopic data from geological specimens and stone tools originating from northern Tanzania. More specifically, I will seek to determine from which outcrops Pleistocene hominins at Oldupai Gorge and beyond obtained rocks to manufacture stone tools. These data may come to reveal important spatio-temporal patterns between raw materials, stone technologies, and hominin species as well as contribute to our understanding of the origins of resource extraction.