4,6,8 Markers Tectonic

Question 1

Explain 2 hazards created by a volcano

Answer 1

Secondary hazard= Lahar, volcanic mudflow when rainfall mobilises volcanic ash, occurs in subduction zone in a composite volcano. They travel at high speed (60km/h) and can cause major destruction e.g flooding and infrastructure collapse

Primary= pyroclastic flows, large dense clouds of hot ash and gas (600º) flow down a volcanoes slope at speeds exceeding 160km/h, incinerating everything in its path which can also suffocate victims e.g. pompeii