Fossil Worm Burrows Reveal Very Early Terrestrial Animal Activity and Shed Light on Trophic Resources after the End-Cretaceous Mass Extinction | PLOS ONE
![TraceFossil - Stetton. Trace fossils are the remains of animal activity. Those found in Nashville are burrows of worm-… | Fossil, Animal activities, Invertebrates TraceFossil - Stetton. Trace fossils are the remains of animal activity. Those found in Nashville are burrows of worm-… | Fossil, Animal activities, Invertebrates](https://i.pinimg.com/originals/e1/34/70/e13470ca790f054603c0c97ecdb0a7f4.jpg)
TraceFossil - Stetton. Trace fossils are the remains of animal activity. Those found in Nashville are burrows of worm-… | Fossil, Animal activities, Invertebrates
![File:Daemonelix (fossil beaver burrow) (Harrison Formation, Middle Miocene; Sioux County, Nebraska, USA) 2 (33518805105).jpg - Wikimedia Commons File:Daemonelix (fossil beaver burrow) (Harrison Formation, Middle Miocene; Sioux County, Nebraska, USA) 2 (33518805105).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/4/4b/Daemonelix_%28fossil_beaver_burrow%29_%28Harrison_Formation%2C_Middle_Miocene%3B_Sioux_County%2C_Nebraska%2C_USA%29_2_%2833518805105%29.jpg)