The Lake Superior Agate |
Common terms and phrases
abrasion agate collecting agate hunters agate pickers agate's agates Figure agates weighing amygdule areas band of chalcedony banding plane basement began big agate cabochon calcite called cavity chalcedony Charlie chatoyance clear quartz collectors color cracks crystal impression deposited Duluth erosion exposed band fill hole find agates formation fortification pattern gems gemstone geode Geode agates George Flaim glacial glacier gravel pit hematite hobby husk inch iron iron-oxide Lake Superior agate lapidary lapidary technique large agates LAURENTIDE ICE SHEET lava flows look for agates magma material meltwater million years ago MILLION YRS mineral Minnesota MORAINE moss agate NEBRASKAN GLACIATION North Shore occurred Ojakangas and Matsch oxidation picking Picture magnified piles Portfolio pounds PRECAMBRIAN pressure produced rare Redrawn from Minnesota's rifting event rough sacks saginite sand and gravel search for agates silica silica-rich solutions slang solutions entered specimens Superior lobe surface tion types vesicle water-level agate weathering WISCONSIN GLACIATION