This simple and enjoyable field trip takes us to locations along a local river. We will observe and compare the size and shape of boulders and pebbles that are eroding as they make their passage from mountains to sea. This is a great activity as it is conceptually easy to grasp but leads to many questions about landscapes, erosion, river flow, weather, different rock types and the rock cycle.
We will look at the geological history at Titahi Bay and how a combination of tectonics, sea level change and erosion processes have shaped the topography that we see today. We will start at the beach to see the basics of the environmental forces at work, understand the greywacke bedrock and find evidence for a fossil forest. We will then visit the rocky coastline a few hundred metres to the north and look at some classic coastal erosion features as well as more geological structures in the bedrock We will start at the beach to see the basics of the environmental forces at work, understand the greywacke bedrock and find evidence for a fossil forest. We will then visit the rocky coastline a few hundred metres to the north and look at some classic coastal erosion features as well as more geological structures in the bedrock.
