honeycombed rock - ice observation
- honeycombed rock
- honeycombed structure
- honeycombing
- honeystone
- hoo cannel
- hood
- hoodoo
- hook
- hook wall pumping packer
- hooked spit
- hooker
- hoop
- hooster coal
- hope
- hopeite
- hoping base line
- hopper
- hopper car
- hopper-shaped
- hoppet
- hoppet suspension gear
- horary angle
- horisontal seam
- horisontal working
- horizon
- horizon A
- horizon B
- horizon being tracked shows variation in reflection character
- horizon beta
- horizon C
- horizon D
- horizon face
- horizon gradient
- horizon layout
- horizon marker
- horizon mining
- horizon of lime carbonate accumulation
- horizon picking
- horizon shape
- horizon slice