This cliff in central Montana was formed by two very different events separated by tens of millions of years - a period of volcanism and an ice age. Here, ice age flows of water along the southern margin of the Laurentide Ice Sheet cut into the Shonkin Sag Laccolith, exposing the spectacular cross-section represented by the cliff. Such views of plutonic formations are rare - something normally only seen in textbook diagrams. To learn more click here (site does not open on many mobile devices).
Saturday, December 5, 2015
Wednesday, December 2, 2015
In response to the climate change conference currently taking place in Paris, some great new resources have appeared. Check out this slick interactive graph (www.bloomberg.com), and then watch the very good video segment below, which aired on PBS Newshour this evening (12/2/15). Here's another - featured on the NY Times site: Short Answers to Hard Questions About Climate Change.
Wednesday, October 28, 2015
Thursday, September 24, 2015
Tuesday, August 25, 2015
This 8.5 minute video from PBS Newshour explains the current situation in New Orleans. Experts examine the new man-made defenses, and look at the causes and impacts of delta erosion as well. - Lots of interesting Earth Science here.