Materials sliding inwards or moving concavely inside of a break
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Tag: <span>A</span>
A geophysical survey performed with a magnetometer aboard, or towed behind, an aircraft
An instrument aboard, or attached to, an airplane used to detect the strength of a magnetic field
A sodium-ferric monoclinic iron silicate, NaFe3+Si2O6, which occurs in soda-rich igneous rock
A horizontal opening driven into a hill or mountain for providing access to minerals
Having a diamond-like luster, and or hardness
Places in a mine that are ventilated and regularly inspected
A fault prone to movement
Containing amygdules. See Amygdule
A mineral group including actinolite, anthophyllite, arfvedsonite, cummingtonite, hornblende, richterite, glaucophane, grunerite, anthophyllite, riebeckite, tremolite, and others