Traversing the Swiss Alps on the Haute Route—the eastern end
After three days of traversing steep rocky passes in the cold and snow, we were ready for warm, clear weather and green valleys with quaint Swiss villages. The last snowy impediment was the Pas de Chévres, which was a little intimidating because of its vertical steel ladders. But by the time we had crossed over the glacier east of Cabane...
Traversing the Swiss Alps on the Haute Route—the middle section
Continuing eastward on the Haute Route is a roller-coaster trek of long uphills and downhills, with great expectations about what type of landscape will appear after topping the next pass and then what little village will lie in the valley at the bottom. In general, lodging in the valleys is in small hotels; in some parts, the route stays high...
Traversing the Swiss Alps on the Haute Route—the western end
The Haute Route was established as a route for skiers but is now also very popular for hikers in the summer. The route extends from Chamonix (France) to Zermatt (Switzerland). There are many variations on the route; most people choose a 7–14 day transect that could include "short cuts" of chair lifts, trains and/or buses. The map below (from https://www.pinterest.com/pin/205828645448998187/)...
The silver mines of Guanajuato Mexico: bringing riches to the region
The city of Guanajuato was founded in 1559 due to the region's rich silver and gold deposits. The conquistador Juan de Tolosa observed the native people with shiny rocks. He started looking in Zacatecas (a state located farther north in Mexico) and in 1546 found silver mines that made him very rich. Other conquistadors started looking too, and in 1548...
Dinosaur National Monument—more public lands worth preserving
My last four posts have been about our public spaces—two national parks and two national monuments. With increased petroleum and mineral exploration and drilling in and near our preserved lands, it behooves us to learn more about the places that may be threatened by the current U.S. administration. In June we visited Dinosaur National Monument, an out-of the way park...
Craters of the Moon National Monument—a little bit of Hawai’i in Idaho
If you ignore the arid climate and sagebrush vegetation in the Snake River Plain of Idaho, and just look at the landscape of lava, you can imagine yourself on the Big Island of Hawai'i. This photograph shows basalt-type lava in pahoe'oe and a'a flows, with cinder cones in the background. The area is still considered to be volcanically active, with...
Mount St. Helens—the most active Cascade volcano
The 1980 eruption of Mt St Helens was the most deadly and costly volcanic event in U.S. history, which is not to say that it will be the most dangerous volcano in the future—that honor may go to Mt Rainier. In contrast to Hawaiian shield-type volcanoes, whose eruptions can damage property but are easy to get away from, Cascade composite-type...
Kilauea in Hawai’i—safely visiting an active volcano
Kilauea grabbed the attention of the media and the public when it began a new eruption on May 4, 2018. This is normal business for one of the most active (maybe THE most active) volcanoes on Earth. The Big Island of Hawai'i is located on top of a hot spot that is providing the fuel for continuing volcanic activity—imagine a...
What is so special about the Cascade-Siskiyou National Monument?
This national monument spans the border between Oregon (Jackson County) and California (Siskiyou County) immediately east of the I-5 freeway. It was first established in 2000 by President Bill Clinton and expanded in January 2017 by President Obama as one of his last actions before leaving office. The monument is managed by the Bureau of Land Management (BLM) from the...
The Great American Biotic Interchange
With its many excellent fossil sites, Argentina has lots of evidence for how life evolved through time. One of the largest effects on how organisms evolved was the position of the continents. For example, when the continents were united into the "super continent" called Pangea at the end of the Paleozoic, land animals could migrate for huge distances. In contrast,...
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...
Argentina—a paradise for fossils of dinosaurs and proto-mammals
We visited Parque (park) Ischigualasto, which means "the place animals go to die" in the local indigenous language. The native people saw many bones in the region, which was the reason for this name. Later, of course, these bones were recognized as animals that have long been extinct. We also visited the Museo de Ciencias Naturales (museum of natural sciences)...
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.