Flow banding is a textural feature observed in volcanic rocks, characterized by the alignment of minerals and vesicles in response to the flow of magma. This banding reflects the movement and deformation of the molten material and is important in understanding the dynamics of volcanic eruptions and the cooling history of lava flows.
Source McPhie, J., Doyle, M., & Allen, R. (1993). Volcanic Textures: A Guide to the Interpretation of Textures in Volcanic Rocks. University of Tasmania Centre for Ore Deposit and Exploration Studies.