Los Picos de Europa—a history of collisions
We now travel farther back in time to the Paleozoic Era when Los Picos de Europa (the Peaks of Europe) were formed in a series of sedimentary basins that were later deformed and uplifted during two major collisions between continents. This post focuses on the geologic history of Los Picos and my next post will focus on the 10-day trek...
How did the Himalayas get to be Earth’s highest mountain range?
In my last four posts, I described the 21-day trek we did in the Everest region in November 2021, including some of our geologic observations along the way. In this final post, I explain how these mountains evolved to achieve such immense size and beauty. Here's how Earth's continents were distributed 50 million years ago (Ma). At about 200 Ma,...
Trekking in the Khumbu region of the Nepal Himalayas, Part 4: from Gokyo back to Lukla
The last leg of our 21-day trek extended west from Goyko to cross the Renjo La (pass), then south down the Bhote Koshi valley back to Namche, and finally down the Dudh Koshi valley to Lukla, where we flew back to Kathmandu. Please see my first post for a map of the trek, including this last leg: https://landscapes-revealed.net/trekking-in-the-khumbu-region-of-the-nepal-himalayas-part-1-from-kathmandu-to-namche/. The area...
Trekking in the Khumbu region of the Nepal Himalayas, Part 3: to Everest Base Camp and Goyko
From Chhukhung (end of Part 2 post: https://landscapes-revealed.net/trekking-in-the-khumbu-region-of-the-nepal-himalayas-part-2-all-hail-to-ama-dablam/), our next destination was Gorak Shep and Everest Base Camp. We trekkers split into two groups: one group hiked from Chhukhung over the Kongma La (pass) to Lobuche; the other group hiked down the valley from Chhukhung to Dingboche, then followed another valley northward to Lobuche. See my first post for a...
Trekking in the Khumbu region of the Nepal Himalayas, Part 2: All hail to Ama Dablam
This second post about trekking in our planet's highest mountains is a tribute to Ama Dablam, the mountain we saw all along the route to the northeast from Namche to Chhukhung, where we reached the highest elevation of the trek. As we continued uphill, we found steeper trails, more primitive lodges, and lots of in-your-face geology! Link to my first...
Trekking in the Khumbu region of the Nepal Himalayas, Part 1: from Kathmandu to Namche
What geologist doesn’t yearn to experience the grandeur of our planet’s highest mountain range? Certainly, I was exhilarated by the opportunity to gaze upon the breathtaking landscapes of the Himalayas, formed during the past 50 million years, as the sub-continent of India has been colliding with the continent of Asia. We spent the month of November 2021 in Nepal—the main...
Plate tectonics 101—what happens when plates move toward each other?
When plates move away from each other (divergent boundaries; see last post on December 31), new oceanic crust is created. Since Earth is not expanding, ocean crust must be destroyed elsewhere. This happens at convergent boundaries, where plates move toward each other. Here, oceanic crust is destroyed, or rather, it gets recycled back into Earth's depths. The places where oceanic...
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.