The paper, "Rapid volcanic ash entombment reveals the 3D anatomy of Cambrian trilobites," was published in the journal, ...

Photograph by James L. Amos The iconic arthropods of the Cambrian were the trilobites, which left a huge number of fossils. Trilobites had flattened, segmented, plated bodies that helped to ...

The new trilobite fossils are Cambrian in age (around 509 million years old) and preserved as undistorted three-dimensional molds within fine volcanic ash, not unlike the human bodies entombed at ...