Geological units
Hauterivian (Cretaceous / Lower Cretaceous )
Hettangian (Jurassic / Lower Jurassic )
Hirnantian (Ordovician / Upper Ordovician )
Holocene (Quarternary )
Homerian (Silurian / Wenlock )
Induan (Triassic / Lower Triassic )
Jiangshanian (Cambrian / Furongian )
Kasimovian (Carboniferous / Pennsylvanian )
Katian (Ordovician / Upper Ordovician )
Kimmeridgian (Jurassic / Upper Jurassic )
Klikov Formation (Cretaceous / Upper Cretaceous / Cenomanian )
Kungurian (Permian / Cisuralian )
Ladinian (Triassic / Middle Triassic )
Langhian (Neogene / Miocene )
Llandovery (Silurian )
Lochkovian (Devonian / Lower Devonian )
Lopingian (Permian )
Lower Cretaceous (Cretaceous )
Lower Devonian (Devonian )