TY - RPRT TI - Timescales of magmatic differentiation from alkali basalt to trachyte within the Harrat Rahat volcanic field, Kingdom of Saudi Arabia AU - Mark E. Stelten AU - Drew T. Downs AU - Hannah R. Dietterich AU - Gail A. Mahood AU - Andrew T. Calvert AU - Thomas W. Sisson AU - Hani M. Zahran AU - Jamal Shawali PY - 2018 DO - 10.1007/s00410-018-1495-9 UR - https://pubs.usgs.gov/publication/70198364 ID - 70198364 ER -