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- | image = development-geology-reference-manual.png | title = Development Geology Reference Manual12 KB (2,020 words) - 16:19, 20 January 2022
- * age Wikipedia:Age (geology) * arkose http://geology.about.com/od/rocks/ig/sedrockindex/rocpicarkose.htm22 KB (3,024 words) - 21:42, 19 December 2014