aa Quick reference
Volcanic **lava rock that is thick and porous and has a rough, jagged surface when it cools. It
Aalenian Quick reference
A *stage in the European Middle *Jurassic (175.6–171.6 Ma, Int. Commission on Stratigraphy, 2004). See also
abandoned channel Quick reference
A former stream channel through which water no longer flows (e.g. a *cut-off).
abandoned well Quick reference
Any *well that has not been used for a long time and/or is not properly sealed, and is so
abandonment facies association Quick reference
A *facies association formed under conditions of rising sea level, when *clastic deposition has ceased and sediment is
abapical Quick reference
A directional term meaning away from the shell *apex.
abaptation Quick reference
The process by which an organism is fitted to its environment as a consequence of the characters it inherits, which
abatement Quick reference
The elimination or reduction of emissions that create *pollution. Examples include smoke abatement and noise abatement.
abatement debris Quick reference
Waste materials produced by *remediation activities.
Abbey, Edward (1927–89) Quick reference
who wrote the book *Desert Solitaire and is remembered for his strong criticism of public land policies and his