Abundances relative to H (top panel) and Fe (bottom panel) towards GRB 080310 (diamonds and arrows), compared to other absorbers (rectangular regions), taken from Table 8 (see text for a description of the pre-burst ionization corrections). The LLS [X/H] abundances are based on the observations of a few LLSs, and the corresponding [X/Fe] derived by combining the [X/H] ranges (the resulting [X/Fe] ranges are probably overestimated). Thin arrows are ionic abundances for GRB 080310, i.e., uncorrected for ionization, observed at epoch II. The [C/Fe], [O/Fe], and [Si/Fe] estimated in GRB 080310 are much lower than previously observed in DLAs, sub-DLAs, and LLSs.