Top: [Zr/Ba] vs. [Ba/H] showing anti-correlations. The clumping visible at higher [Ba/H] abundances may be indicative of some common formation (s-) process for Zr and Ba. Bottom: [Zr/Eu] vs. [Eu/H], showing a clear, strong anti-correlation over the entire range of [Eu/H] values for the dwarfs. This resembles the behaviour seen for [Ag/Eu] vs. [Eu/H].
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