The original description page was here. All following user names refer to en.wikipedia.
2005-07-26 14:22 PDH 960×718×8 (98424 bytes) Diagram describing the rock cycle, from [http://www2.nature.nps.gov/geology/usgsnps/rxmin/rockcycle.pdf] {{PD-USGov-Interior-NPS}} {{PD-USGov-Interior-USGS}}
Captions
Add a one-line explanation of what this file represents