Geology

What is the shape of Mount Hekla?
According to NAT travel guides, the Hekla volcano has erupted dozens of times in recorded history. The most recent eruption...
How is hornfels formed?
Hornfels is formed when mudstone or shale come in contact with metamorphic rock and a hot igneous body, this represents...
How do volcanic rocks differ in composition?
Volcanic rocks differ due to their rapid eruption as well as the time it takes to cool down. This makes some to be plutonic...
What is a machine used to measure earthquake activity?
The machine that is used to measure earthquakes is known as seismograph or a seismometer. An earthquake is the effect that...
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