This rampart, shaped like a star and perhaps 300 feet from point to point, was built of Jurassic sandstone blocks of irregular size, averaging 6 × 8 feet in surface.
Gotorleku hura, izar-formakoa eta agian hirurehun oinekoa muturretik muturrera, hareharri jurasikozko bloke irregularrez eraikia zen, 6 x 8 oineko batez besteko azalerakoak.