Activity continued in the Holocene, with lava flows covering Holocene features[1] such as 10,000 years old lacustrine sediments,[34] pottery[1] and having a fresh appearance. Tuareg oral tradition of "fire mountains"[14] appears to recount that Tuareg people observed eruptions.[1] Local heat flow anomalies,[35] rare fumaroles and observed seismicity are further evidence of ongoing volcanism.[14]