Fossils on Friday – Crossbedding & Horizontal Deposition Pt. 3

Hello and welcome back to Fossils on Friday.

Over the last few weeks we’ve been looking at the concept of horizontal or ‘sideways’ deposition, and how it ties up to the real world. This week, we’ll look at some real-life examples of this, in both geology and an example of it actually forming.

In the south-west of the UK, on the coast of Devon, there is an area known as the ‘Valley of Rocks’. This is where some of the first rocks in the UK were studied, and became known as ‘Devonian’ rocks, after the county. These rocks and layers show remarkable examples of crossbedding throughout the formations.

But when you get down on the beach, there is a small stream that is running out of the cliffs and down onto the beach. As it hits the beach, it begins to pick up sediment particles from the sand around it, and carries it toward the sea. Before it reaches it, however, it begins to deposit it down – horizontally!

When we visited the location last year, we filmed a short video explaining what crossbedding is, and how it forms, as well as the stream-deposition. This has been edited together by Sarah-Ann for us, and it’s available for the first time, specially for Fossils on Friday!

Watch the video below, and discover the amazing processes at work all the time around the world!