The Pico volcano is not situated in Africa; it's in the Azores, Portugal, which is part of the European continent. The volcano itself is considered very recent, with an estimate age of 750,000 years.
Yes there are 14 all spread around, the most famous is the Kaliomo it is a constructive volcano near Kenya. It is 2000ft tall. When it erupted in 1922 it killed 1000 people from all around Africa. It...
The ejecta from a volcano may be dated. The material from the oldest part of the volcano may be well covered and inaccessible. Large explosions from the past may have cast ash widely, and this may be...