Sequence Stratigraphy and other topics (April 30 & May 2)

There is no better resource for sequence stratigraphy than the excellent on-line guide written by my colleague Steve Holland at the University of Georgia Stratigraphy Laboratory. The extensive sequence stratigraphy webpages at the University of South Carolina are also very good. They include animations and exercises. Who needs professors these days?

On the last class day of this course we traditionally cover topics of our choice. If we have time, we will talk about the Channeled Scablands of eastern Washington and related topics, including the famous jökulhlaups. There is a good story here as well about a persistent and ingenious geologist named J Harlen Bretz. We may finish the course by briefly covering biostratigraphy and chronostratigraphy. The sites I’ve found on the topic are either terribly dull or well below your highly-developed skills. There are many detailed pages as examples of chrono- and biostratigraphy, like this one on the new Ypresian/Lutetian boundary stratotype. Wikipedia has a useful page on magnetostratigraphy with links to various practical examples.

Remember that your Final Lab & Lecture Exam is Tuesday, May 7, 3:00 – 5:00 p.m.

New Oxford Conglomerate (Triassic) of York County, Pennsylvania. Collected by Dr. Shelley Judge. (Click to enlarge.)

Geology in the News –

When methane hydrates are in the news, it is rarely good. The warming of the Arctic with the epic thawing of permafrost, is already producing thermal feedback and massive expenses.

With new technology (and ideas), our concepts of the Earth’s interior have become more complex. The core-mantle interface is especially interesting. We may at last be learning about the origin of mantle plumes.

Check out this newly described carnivorous mammal larger than a polar bear. It is 22 million years old and African. The specialized teeth of Simbakubwa kutokaafrika are impressive.

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