Gas phase abundance ratios for morning (ϕ = −90.0, dashed lines) and evening (ϕ = 90.0, solid lines) terminators. Some morning-to-evening terminator differences exists. Top: mineral ratios Si/O, Mg/O, and Fe/O are strongly affected by element depletion due to cloud formation. Bottom: C/O ratio appears to be less affected, but oxygen is two orders of magnitude more abundant in a solar set of element abundances. C/O is therefore shown on a linear scale, where C/O = 0.55 is the solar value.