A grayish-white metallic element used in semiconductors and alloys
A grayish-white metallic element used in semiconductors and alloys
The most common sulphide ore of lead
Thermal energy derived from within the Earth
The measurement of space between a sieve through which the majority of aggregate will pass
A physical evaluation of rocks by the measurement including magnetism, conductivity, specific gravity and radioactivity
A weakly radioactive monoclinic mineral which occurs in granites and granite pegmatites
The measurement of physical properties in rocks and minerals
A group of dark intrusive igneous rocks composed of plagioclase and clinopyroxene
The history of the earth as classified by eon, era, period and epoch
The systematic mapping of an area to record the characteristics of its underlying geology