Bienvenidos a Colombia: welcome to the northwest corner of South America

In my continuing quest to learn more about South America’s geology, culture and history, I traveled for a month (mid February–mid March) in Colombia, located in the northwestern corner of South America. Colombia is at the northern end of the Andes, the longest mountain range on our planet. It is the only South American country with coasts on both the...
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Earthquakes tell the story of changing tectonic plates along the Andes

We are now in Córdoba city (capital of the province of Córdoba), which is nearly 600 km (360 miles) east of the Cordillera Principal (high Andes). To the east of Córdoba are the flat plains of the pampa; to the west are the Sierras de Córdoba that, together with the other ranges lying eastward of the Cordillera Principal, are referred...
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Why are there earthquakes in Lisbon?

Lisbon is similar to San Francisco not only because of its position on the edge of an estuary and its Golden-Gate-like bridge. Another similarity is immediately obvious in the topography of the landscape—steep slopes and numerous hills separate distinctive neighborhoods and make the city feel larger than it is. Both cities have streetcars. Whereas San Francisco's streetcars stick to the...
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About the Blogger

Karen (here with Mt. Shasta in background) is a geology professor emerita who aims to provide a "pocket geologist" for world travelers. Follow the blog to explore the landscapes of our planet and figure out what causes them to look the way they do.

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