TY - RPRT TI - Iridium abundance measurements across the Cretaceous/Tertiary boundary in the San Juan and Raton Basins of northern New Mexico AU - C. J. Orth AU - J. S. Gilmore AU - J.D. Knight AU - R.H. Tschudy AU - C. L. Pillmore AU - James E. Fassett PY - 1982 DO - 10.1130/spe190-p423 UR - https://pubs.usgs.gov/publication/70207330 ID - 70207330 ER -