Fossils are incredible remnants of an ancient world. They can be billions, millions, thousands etc. years old and their antiquity has always intrigued humankind.
Sometimes fossils can be very easily spotted in rocks because their telling shape stands out in a rock, but sometimes it may not be so easy and one has to know what to look out for.
In this post I present an array of marine shell fossils in sandstones and siltstones that represent shallow to deep sea environments from around 250 million years ago. I hope these can help you learn what to look out for and so you too can spot fossils in your local rocks.