TY - RPRT TI - Thallium isotope evidence for a permanent increase in marine organic carbon export in the early Eocene AU - S.G. Nielsen AU - S. Mar-Gerrison AU - A. Gannoun AU - D. LaRowe AU - V. Klemm AU - A. N. Halliday AU - K.W. Burton AU - J.R. Hein PY - 2009 DO - 10.1016/j.epsl.2008.12.010 UR - https://pubs.usgs.gov/publication/70032627 ID - 70032627 ER -