TY - RPRT TI - Diagenetic overprinting of the sphaerosiderite palaeoclimate proxy: are records of pedogenic groundwater δ 18 O values preserved? AU - David F. Ufnar AU - Luis A. Gonzalez AU - Greg A. Ludvigson AU - Richard L. Brenner AU - Brian J. Witzkes PY - 2004 DO - 10.1046/j.1365-3091.2003.00615.x UR - https://pubs.usgs.gov/publication/70027111 ID - 70027111 ER -