I think it’s both ice cores and tree rings
The first step in a trial is to select from the panel the number of jurors required to try the case.
Answer: Effusive eruptions occur when hot, (12000C) runny basalt magma reach the surface. Dissolved gases escape easily as the magma erupts, forming lava that flows downhill quite easily. Effusive eruptions build up gently-sloping Shield Volcanoes like Hawaii.
Explanation: