Between approximately 2000-1800 Ma, on the northern margin of the Yilgarn Craton, the c. 1890 Ma Narracoota Volcanics of the Bryah Basin formed in a transverse back-arc rift sag basin during collision. Culmination of the cratonic collision resulted in the foreland sedimentary Padbury Basin. To the east the Yerrida and Earaheedy Basins were passive margins along the Yilgarn's northern margin. The c. 1830 Ma phase of the Capricorn Orogeny resulted in northeast-southwest deformation of the Bryah-Padbury Basin with flood basalts in the Yerrida Basin.