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172 mudrock chemistry in the southwes- tern, United States. Geochimica et Cos- mochimica Acta, 59(14), 2919Ȃ2940. CROOK, K.A.W. (1974). Lithogenesis and geotectonics: the signiϐicance of com- positional variation in ϐlysch arenites (greywackes). Society of Economical, Paleontological and Mineralogical Spe- cial Publications, 19, 304Ȃ310. CONDIE, K.C., NOLL, P.D., CONWAY, C.M. (1992). Geochemical and detrital mode evidence for two sources of Early Prote- rozoic sedimentary rocks from the Ton- to Basin Supergroup, central Arizona. Sedimentary Geology, 77, 51Ȃ76. CONDIE, K.C. (1993). Chemical composition and evolution of the upper continental crust: contrasting results from surface samples and shales. Chemical Geology, 104, 1Ȃ37. CULLERS, R.L. (1994). The controls on the ma- jor and trace element variation of shales, siltstones, and sandstones of Pennsyl- vanian-Permian age from uplifted con- tinental blocks in Colorado to platform sediment in Kansas, USA. Geochimica et Cosmochimica Acta, 58, 4955-4972. CULLERS, R.L. (1995): The controls on the major- and trace-element evolution of shales, siltstones and sandstones of Ordovician to Tertiary age in the Wet Mountains region, Colorado, U. S. A. Che- mical Geology, 123, 107-131. CULLERS, R.L., BOCK, B., GUIDOTTI, C. (1997). Elemental distributions and neody- mium isotopic compositions of Silurian metasediments, western Maine, USA: re- distribution of the rare earth elements. Geochimica et Cosmochimica Acta, 61, 1847Ȃ1861. DEPAOLO, D.J., WASSERBURG, G. J. (1976a). Nd isotopic variations and petrogenic models. Geophysical Research Letters, 3, 249Ȃ252. DEPAOLO, D.J., WASSERBURG, G.J. (1976b). Inferences about magma sources and mantle structure from variations of 143 Nd/ 144 Nd. Geophysical Research Let- ters, 3, 743-746. DEPAOLO, D.J. (1981). Neodymium isotopes in the Colorado Front Range and crust Ȃ mantle evolution in the Proterozoic. Na- ture, 291, 193Ȃ197. DEPAOLO, D.J. (1988). Neodymium Isotope Geochemistry, an Introduction. Berlin, Springer-Verlag, 187 pp. DICKIN, A. (1995). Radiogenic Isotope Geo- chemistry. Cambridge University Press, Cambridge, 492 pp. DUNAI, T.J. (2010). Cosmogenic nuclides: principles, concepts, and applications in the earth surface sciences. Cambridge University Press, Cambridge, 198 pp. DICKINSON, W.R. (1982). Compositions of Sandstones in Circum-Paciϐic Subduc- tion Complexes and Fore-Arc Basins. American Association of PetroleumGeo- logists Bulletin, 66 (2), 121-137. DICKINSON, W.R., BEARD, L.S., BRAKENRIDǧ GE, G.R., ERJAVEE, J.R., FERGUSON, R.C., INMAN, K.F. (1983). Provenance of Nor- th American Phanerozoic Sandstones in Relation to Plate Tectonic Setting. Geo- logical Society of American Bulletin, 94 (2), 222-235.