Collecting Bryozoa from Stevns Klint, Denmark 70 million years ago, Denmark was a warm sea. Rich and varied communities of invertebrates inhabited the seafloor. These ecosystems left behind vast chalk deposits, which have been mined for building material, writing utensils, and fertilizer for over a thousand years. The chalk is also special to paleontologists, because it is rich in fossils and spans the Cretaceous-Paleogene (K-Pg) boundary, one of the largest mass extinctions in Earth’s … [Read more...] about How do mass extinctions reshape ecosystems?
Posted by Maya Samuels-Fair