Couloir
A mountain chain is called a mountain chain.
A group of mountain ranges is called a mountain range system or a mountain chain.
The tip of a mountain is called a peak.
A Mountain Range
the thin mountain ridge is called an arête.
A dry gully is called a gulch or a arroyo.
Couloir
A desert gully is called a Wadi in Africa and Asia, arroyo or gulch in the Americas.
Gully cricket is played in India. Actually, 'gully' is the hindi language term for a narrow street. Lot of young children play cricket in the streets of India and that is why it is called gully cricket.
A channel that carries runoff after a rainstorm is called a gully. Gullies are water-worn ravines. A gully is also called a gorge, canyon, or gulch.
A wooded ravine is called a gully.
gully erotion is something that makes trenches
The plural of gully is gullies. As in "this is the gullies".
A valley or a basin or a gully, or perhaps a swale or a depression.
The Don wants to be a gully!
Jack Emmott is THE Gully God
Gabriel's Gully is the name of the pioneer gold mining area near Lawrence, Otago. I know of no association with the Wairarapa.