Lower Carboniferous Coral Fossil at Silloth

 

I had no idea there were fossils on our side of the Solway. Thanks to Isla and Millie for their eagle eyes in spotting this rock. I think it is a coral as it looks like other pictures I've seen but I have no qualification in fossil ID. I think it will be Lower Carboniferous Limestone from the Middle Border Formation that has washed over from the Scottish coast. If this identification is correct then the rock is 340 million years old. This does happen because Criffel Granite pebbles arrive too. An overview of the Border Group is here. An interesting expedition on that coast is here.