A lithic tradition based in southeastern Brazil, dated to the 5th millennium be and lasting into the Christian era. Its earliest manifestation is a rough flake, essentially unifacial, industry although some bifaces do appear, notably the boomerang shape. Clearly hunting oriented (artefacts include flake knives, choppers and scrapers), its earliest manifestation has no projectile points. Biface projectile points begin to appear in the 3rd millennium be and semi-polished axes and grooved bola stones are added in c2000-1000 be. The complex remains non-ceramic throughout, although ceramics are evident elsewhere in Brazil at the same time. Insufficient archaeological data have kept the chronology vague.