"Chengjiang Formation" The Chengjiang Formation is world-renown as being the earliest window into the Cambrian explosion. Like the Burgess Shale lagerstätten, the soft-bodied animals of the Chengjiang are preserved in fine mudstones, revealing a great diversity of the earliest arthropods. This illustration shows some of the extraordinary creatures as Haikouella (upper left), swimming Isoxys arthropod (lower right), Eoredlichia trilobite (center), Naraoia hunting a worm (left) and a big  Anomalocaris appearing in the upper left side of the scene. Rich fauna of sponges, brachiopods, worms populate the bottom of the sea. Media: Adobe Photoshop. Click on arrows to get closer or view next illustration.