A strip of land, bounded by parallel faults, that has subsided between the faults; pl. graben. Many linear rilles on the Moon are graben, including the Rimae Sirsalis, about 3.5 km wide and over 400 km long.
A downthrown, linear, crustal block, bordered lengthways by normal faults. The upstanding blocks on either side may have been lowered by erosion. It is a structural feature, which may be of considerable length, caused by the relative lowering of a block between two faults or fault zones. The faults are commonly high-angle, normal faults which are parallel in their strike direction. Half-graben are bounded on only one side by one or more faults and are associated mainly with tilt-block tectonics. Graben with a regional extent and topographic expression can also be called rift valleys. Compare horst.
Graben (includes half-graben)
- hallux
- Hall–Heroult cell
- Hall–Héroult smelting process
- Hall’s Theorem
- Halmos, Paul Richard (1916–2006)
- halmyrolysis
- halo
- haloalkanes
- halo, atmospheric
- halocarbons
- haloclasty
- halocline
- halo CME
- halo effect
- haloform reaction
- haloforms
- halo, galactic
- halogenating agent
- halogenation
- halogens
- halokinesis
- halon
- halo nucleus
- halo orbit
- halophile