Taxonomy term

stratigraphy

Measuring rising seas is tricky in deltas

Earth’s stratigraphic record offers a patchwork diary of how different parts of the planet have formed and changed over time. Some of the most extensive pieces of the stratigraphic record are found in deltas, making them ideal places to look for long-term chronicles of Earth’s history, as well as clues to future changes to our coastal landscapes.

26 May 2016

Impact or eruptions: Are both to blame in the great end-Cretaceous whodunit?

Few episodes in geologic history are as widely recognized — and debated — as the end-Cretaceous extinction. For several decades, the Chicxulub impact has been the primary suspect. But new research suggests the impact wasn’t solely responsible for the extinctions; widespread volcanism in India seemed to play a role as well.

25 Jan 2016

Down To Earth With: John Underhill

“The Odyssey” follows Odysseus’ 10-year journey home to Ithaca after the Trojan War. John Underhill, a stratigrapher at the University of Edinburgh in Scotland, has been on his own odyssey over the past seven years — to test whether Ithaca actually existed. For centuries, scholars assumed that the people and places described by Homer in his epic poems were fictional, but archaeological finds elsewhere, such as Troy and Mycenae, have proven that these stories were grounded in reality.
 
01 Jun 2011

Geology 101: Reading the story in the rocks

David Harwood’s field geology course gives future teachers an introduction to several of geology’s most fundamental principles, including the stratigraphic basics described by Nicholas Steno in 1669. Go to the head of the class with this quick primer.

20 Oct 2009

Redefining Quaternary

Blogging on EARTH

The Quaternary Period — the geologic time period that includes human evolution up to the present — is now a bit longer than it used to be.

04 Jun 2009