Continuing with the theme from my last post, here are some pieces of coquinoid limestone that are composed primarily of Agnostus pisiformis molts. They come from the Late Cambrian Alum Shale formation near Kinnekulle in Vastergotland, Sweden. It's amazing to see so many Trilobite molts all clumped together. There must have been so many of the animals that they looked like a swarm of bees or gnats or possibly a school of fish.
Thanks to Christian for sending me these fossils!