Tradition roughly contemporary and co-regional with Humaita in southern Brazil, but differing from it by the presence of projectile points at an early date. The most common point form is the elongated triangle, which is often found in association with pounders, anvil stones, bolas and polished axes. By the 2nd millennium bc there is a noticeable decline in the variety of projectile points and the scraper becomes the most common artefact. Although the tradition persisted into the early centuries ad, when ceramics had already begun to appear in northeast Brazil, Umbu remained nonceramic.
The Macmillan dictionary of archaeology, Ruth D. Whitehouse, 1983Copied