La Marbrière climbs the full height of the Socle de la Carrière, a south-facing slabby cliff low on the Sainte-Victoire above the old 'marble' quarry. It is mostly easy-angled friction slab on a compact, colourful breccia, broken by a few steeper steps and by ledges, with the hardest move right off the last belay. Bolting is modern (big yellow hangers) but spaced on easy ground, up to about 7 m, and closer on the hard moves. It is widely used as a first multipitch, though several parties warn that leaders should be solid at the grade because of the spacing. Opinion is split: most find it a pleasant outing, one party found it disjointed and overgraded.