Richard Garlick our geology expert, also Rosa's father, spoke to us. He told us that some changes to landforms happen quickly like landslides, earthquakes and tsunamis. Some changes happen over days like volcanoes erupting, some can happen very slowly like the ice age and erosion. He talked about plate tectonics and explained that plates move very slowly, about the speed our finger nails grow. Dunedin Harbour and the Penisula were formed from a shield volcano. It last erupted about 10 million years ago. The centre of the volcano is thought to be between Portobello and Port Chalmers and may have been as high as 1000 m. It probably happened due to a hot spot. These areas have changed over time due to erosion.
Richard told us that the present is key to the past. We need to look at what is happening to our earth today, to find out about what happened millions of years ago.
We were fascinated by the changes that are happening to our Earth and need to remember we are the guardians of our Earth, and must look after it.
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