One of the key reasons for Federation was to achieve a united defence force which could better protect Australia. Around the 1880s, the Australian colonies had become increasingly concerned over the close proximity of foreign powers.
Split and merge into it. Answered by The Community. Making the world better, one answer at a time. Dissolved gases trapped in the magma provides the force that causes magma to erupt to the surface. Magma is molten material before it reaches the surface and is lava.
geysers erupt because it meets rock heated by magma. It erupts about every 92 minutes. the most common cause for a geyser to erupt is due to a tempreature and pressure problem. A geyser erupts when superheated ground water, confined at depth, becomes hot enough to blast its way to the surface.