| Group/formation name | Group/formation name |
|---|
| Hongyanjin - China | Horn Valley Siltstone - Australia |
| Hongyanjing - China | Hornbrook - Blue Gulch, Ditch Creek, Osburger Gulch, Osburger Gulch Sandstone, - United States |
| Honna - Canada | Hornby Bay/East River - E3, - Canada |
| Honorat - Canada | Horned Toad - United States |
| Honsda/Villa VIeja - Baraya, - Colombia | Hornerstown - United States |
| Honsel - Germany | Hornillatorre - Spain |
| Honseler - Germany | Hornitos - Chile |
| Honseler Schichten - basal portion, - Germany | Hornos-Siles - Spain |
| Honto - Russian Federation | Horokaoshirarika - Japan |
| Honto/Aushi - Russian Federation | Horombetsu - Japan |
| Honto/Hacchorei - Russian Federation | Horoshin - Japan |
| Honya - Japan | Horquilla - Mexico |
| Honya Mudstone - Japan | Horry Clay - United States |
| Hoodoo - United States | Horse Spring - Bed 1, - United States |
| Hook head - Ireland | Horseshoe Canyon - Drumheller , Horsethief, - Canada |
| Hookton - United States | Horseshoe Gulch - 5, - United States |
| Hope Gate - Jamaica | Horseshoe Gulch unit - 5, - United States |
| Hope Shale - Stapeley Volcanic, - United Kingdom | Horster - Germany |
| Hope Shales - United Kingdom | Hortezuelos - Spain |
| Hopedale - United Kingdom | Horton - Canada |
| Hopedale Limestones - United Kingdom | Horton Bluff - Blue Beach, Hurd Creek, - Canada |
| Hopkinton - Farmers Creek, Marcus, Picture Rock, Sweeney, - United States | Horton/Albert - Canada |
| Hopkinton Dolomite - United States | Horton/Cheverie - Canada |
| HorcoĢn - Chile | Horton/Horton Bluff - Canada |
| Hordaland - North Atlantic | Horton/Horton Bluff ? - Canada |
| Horderley - United Kingdom | Horton/Kennebecasis - middle, - Canada |
| Horderly Sandstone - Middle, - United Kingdom | Horton/Memramcook - Canada |
| Horimatsu - Izumo, - Japan | Horton/Wilkie Brook ? - Canada |
| Horlick - Antarctica | Hosan Coal-Bearing - North Korea |
| Horn Plateau - Canada | Hosking's Chalk - Australia |