The top documents tagged [devonian mass extinction]

Harz Excursion – March 2006 (or…. where are these crazy geologists taking us??!!!) The Harz Mountains….. - Mittelgebirge – “low mountain range” - 180km.

---

215 views

Harz Excursion – March 2006 ( or …. where are these crazy geologists taking us??!!!)

---

29 views

Evolution & Adaptations of Placoderms

---

56 views