An instrument aboard, or attached to, an airplane used to detect the strength of a magnetic field
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
Material originating elsewhere. Not country rock
A monoclinic mineral with prismatic cleavage, 2[Ca2(Mg,Fe)5Si8O22(OH)2]
A mineral group including actinolite, anthophyllite, arfvedsonite, cummingtonite, hornblende, richterite, glaucophane, grunerite, anthophyllite, riebeckite, tremolite, and others
The gradual and systematic reduction of a balance in an account over an assigned period