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Wednesday, May 4, 2016

Shonkin Sag Laccolith - Born of Fire and Ice

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

Time-Lapse of Meandering River (28 years)

Click on THIS LINK to watch a river in Bolivia change over a 28-year period. For more about oxbow lakes, CLICK HERE.

Photo courtesy of NASA

Wednesday, December 2, 2015

Excellent New Climate Change Resources

In response to the climate change conference currently taking place in Paris, some great new resources have appeared. Check out this slick interactive graph (, 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.

Tuesday, August 25, 2015

Are New Orleans’ post-Katrina flood defenses strong enough?

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.

Sunday, August 16, 2015

Video of a Microburst near Tucson, AZ

To hear/see a TV meteorologist explain what causes a microburst CLICK HERE (Facebook). To learn more about what causes the air to get cold, CLICK HERE.