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Geological Map of Oxfordshire
Geological Glossary
A'a lava
a basaltic lava characterized by a rough or rubbly surface composed of broken lava blocks called clinker
A-horizon
The uppermost layer of a soil, containing organic material and leached minerals.
abyssal plain
The ocean floor offshore from the continental margin, usually very flat with a slight slope.
accrete
To add terranes (small land masses or pieces of crust) to another, usually larger, land mass.
accrete
To add terranes (small land masses or pieces of crust) to another, usually larger, land mass.
aeolian process
Geological modifications caused by wind activity e.g. erosion or deposition. Derived from Aeolus, the Greek God of wind.
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