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Science Bowl Question

📅 NSB 2014🎓 HS🔄 Round 14#️⃣ Q19❓ TOSS-UP📝 Multiple Choice

Why does dolostone weather to a brownish colored rock?

W) Iron occurs in small amounts, replacing some of the magnesium in dolomite
X) Copper ions replace magnesium in dolostone as groundwater permeates the rock
Y) Aluminum ions replace the calcium in the dolomite compounds, and there is a reaction between aluminum and the remaining magnesium ions
Z) Magnesium ions replace the calcium ions in dolostone compounds
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