Groundwater

Science / Geology / Groundwater: The mass of water in the ground below the phreatic zone, occupying the total pore space in the rock and moving slowly downhill where permeability allows.

Perched Groundwater

Science / Geology / Perched Groundwater: An isolated body of ground-water that is perched above and separated from the main water table by an aquiclude. MORE

Infiltration

Business / Agriculture / Infiltration: The downward entry of water into soil. Also called percolation. A high rate of infiltration means that soil moisture for crops will be higher. Many conservation practices, such as conservation tillage MORE

Phreatomagmatic

Science / Geology / Phreatomagmatic: An explosive volcanic eruption initiated by the interaction of magma and water (usually either meteoric or groundwater). MORE

Hydrothermal Activity

Science / Geology / Hydrothermal Activity: Any process involving high-temperature groundwaters, especially the alteration and emplacement of minerals and the formation of hot springs and geysers. MORE

Landslide

Science / Geology / Landslide: The rapid downslope movement of soil and rock material, often lubricated by groundwater, over a basal shear zone: also the tongue of stationary material deposited by such an event. MORE

Protactinium (Pa)

Science / Periodic Table of Elements / Protactinium (Pa): Atomic number: 91, Atomic mass: 231.0359 g.mol -1, Electronegativity: 1.5, Density: 15.37 g.cm-3 at 20°C, Melting point: 1600 °C, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: u MORE

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