Letter O - Geology dictionary by Futura-Sciences

Alphabetical index

Old karst Old karst is fossil karst that no longer carries water; it ...	Oligocene The Oligocene epoch is the third geological epoch of the ...
Olivine Olivine is a common mineral in eruptive rocks, its chemical ...	Oolitic Oolitic is the name given to mineral aggregates (usually ...
Ordovician The Ordovician is the second geological period of the ...	Ore Ore is a rock, a mineral or an association of minerals ...
Orthorhombic system The Orthorhombic system is the system of which the unit cell ...	Orthosilicate Orthosilicate is a synonym of neosilicate (q.v.).
Osterrite Osterrite is a sedimentary clayey rock, rich in silica and ...	Outcrop An outcrop is the part of a terrain that is visible on the ...
Oxidation zone An oxidation zone is part of a metalliferous deposit ...