The Evolution of the Lithium Abundances of Solar-Type Stars. VI. The End of Lithium in the Pleiades

We have used the HIRES spectrograph on the Keck telescope to obtain echelle spectra of 15 late-K dwarfs in the Pleiades cluster. We derive lithium abundances, rotational velocities, and indices of chromospheric emission. There is less spread in the Li abundance for these cool stars than was seen for early-K dwarfs, and the correlation between rapid rotation and Li richness that was evident in more massive stars breaks down for the late-K dwarfs as well.