IFP: 30ish Most Common Rocks: Easily Confused Set #1
IFP: 30ish Most Common Rocks: Easily Confused Set #1
Completion requirements
Oolitic limestone, Micrite, Fossiliferous limestone, Dolostone, Coquina, Chalk, Sandstone, Shale, Pumice, Rhyolite, Andesite, Marble, Phyllite, Quartzite, Slate, Arkose, Conglomerate, Breccia, Basalt, Rhyolite, Porphyry, Obsidian
Grading method: Highest grade