TY - RPRT TI - Roof-rock contamination of Taylor Creek Rhyolite, New Mexico, as recorded in hornblende phenocrysts and biotite xenocrysts AU - J.H. Wittke AU - W. A. Duffield AU - C. Jones PY - 1996 UR - https://pubs.usgs.gov/publication/70018737 ID - 70018737 ER -