Question

What is in danger of happening when thick magma is formed?

Answer 1

explosive eruptions

Composite volcanoes are also called stratovolcanoes. This is because they are formed by alternating layers  strata  of magma and ash   Figure below  . The magma that creates composite volcanoes tends to be thick. The steep sides form because the lava cannot flow too far from the vent. The thick magma may also create explosive eruptions. Ash and pyroclasts erupt into the air. Much of this material falls back down near the vent. This creates the steep sides of stratovolcanoes.