Abstract We have derived new detailed abundances of Mg, Ca, and the Fe-group elements Sc through Zn ( Z = 21−30) for 37 main-sequence turnoff very metal-poor stars ([Fe/H] ≲−2.1). analyzed Keck HIRES optical near-UV high signal-to-noise spectra originally gathered a Be abundance survey. Using typically ∼400 lines with accurate laboratory transition probabilities each star, we determined LTE met...