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Geological Outings Around the Bay: Alum Rock Park - KQED
Alum Rock Park - Wikipedia
Exploring Alum Rock Park - KQED
Alum Rock Park History - nnvesj.org
Alum Bay - Wikipedia
Geology of Alum Rock Park - YouTube
Geology of Alum Bay, Isle of Wight - by Ian West. (update)
Geology of the Alum Rock area near Stanthorpe, Southeast Queensland
A rock with many perspectives - Geology Page