Contrast between an old and a young Gondwana shield

Johnson, 1976, Composition of the Precambrian Llano uplift, central Texas, U.S.A., Geochim. Cosmochim. Acta, 40, 1419, 10.1016/0016-7037(76)90132-0 Newton, 1989, Metamorphic fluids in the deep crust, Ann. Rev. Earth Sci., 17, 385, 10.1146/annurev.ea.17.050189.002125 Rogers, 1978, Inferred composition of early Archaean crust and variation in crustal composition through time, Vol. 1, 25 Rogers, 1982, Relationship between ages of shields, dips of adjacent sedimentary basements, and the occurrence of oil and gas, J. Pet. Geol., 4, 393, 10.1111/j.1747-5457.1982.tb00550.x Rogers, 1990, Comparison of Indian and Nubian-Arabian shields, Vol. 8, 223 Rogers, 1990, Late-orogenic, post-orogenic, and anorogenic granites: distinction by major-element and trace-element chemistry and possible origins, J. Geol., 98, 291, 10.1086/629406 Taylor, 1986