On the third highest mountain in Mexico with a magnificent view of Popocatépetl
Traverse of the crest of the fourth-highest mountain in Mexico with a view of two crater lakes
Hike to the green crater lake of the active volcano in Chiapas (Mexico)
The perfectly shaped volcano from different angles (Luzon, Philippines)
An explosive volcano near Manila and an island in a lake on an island in a lake on an island in the sea.
Since I don’t have any recent photos to show, here is a picture of a rock sample that has been lying around in my room for a long time. It is one of my favourite samples because I can torture every geoscientist who visits me with the question of what he sees here. Two different … Continue reading “A sample of the Moho”
Hikes through rustic forests, up to the snow-covered Sierra Nevada past araucaria, views of lakes and the Llaima volcano, and finally an ascent of Llaima itself.
A view into the crater of Villarrica and a hike to lakes and araucaria (lake district in Patagonia, Chile)
Tracing the latest volcanic eruption in Chile
The lake district with its green fields, dense rainforests, countless lakes of all sizes and towering volcanoes and mountain peaks is, so to speak, the southern end of civilisation in South America: a little further on, the sparsely populated wilderness of Patagonia begins. I fly to Puerto Montt and drive to the pretty lakeside town … Continue reading “Puerto Varas in the Lake District of Chile”
Jeep tour (with an annoying group) through spectacular scenery: from Salar de Uyuni (Bolivia) via Laguna Colorada and Laguna Verde to San Pedro de Atacama (Chile) with ascent of the Licancabur volcano.
Trekking in the Cordillera Blanca in Peru: In 10 days around Alpamayo and its beautiful neighbours
Hot springs, waterfalls and an active volcano (Ecuador)
Cotopaxi National Park in Ecuador: climb Cotopaxi and hike on Rumiñahui
Picturesque caldera with “crater lake” in Ecuador
How pleasant to be met by Marta at the airport! We spend the first night in Guatemala City, a chaotic metropolis with broken, crowded streets, street kids, …. In a minibus we drive down from the coffee town of Coban through beautiful tropical karst landscape. In a village with a colourful market, more and more … Continue reading “Guatemala”
Ascent of Gunung Agun and various temples, lakes, volcanoes and rice fields
This volcano is situated in the very east of Java. The crater is filled by a greenish sulphuric acid lake. A huge sulphur body has formed near the shore, brown hot sulphuric steam rises hissing. When the wind carries the cloud towards you, breathing is almost impossible, the acid bites your eyes and nose. Some … Continue reading “Kawah Ijen”
Volcanoes in the East of Java: Views into the Tengger Caldera with the steaming Bromo and ascent of the active Semeru with up-close ash eruptions
On the volcano with active lava dome (Java, Indonesia)
Lake in a caldera on Sumatra (Indonesia)
The rocks of the Zermatt-Saas zone are an ophiolite, i.e. originally oceanic lithosphere (of the Penninic Ocean, the deep-sea basin of the Alpine Tethys). However, the unit is highly deformed, so that the normal sequence of serpentinite (mantle), gabbro, basalt and sediments cannot be found in one piece. Furthermore, they were metamorphosed (eclogite facies, retrograde … Continue reading “Zermatt-Saas Ophiolite (excursion)”
More than 2 m of pumice was deposited on the first day of the 79 AD eruption of Vesuvius. The weight caused roofs of buildings to collapse, but people died in the pyroclastic flows (surges) that came down the mountain towards the end of the eruption. A caldera formed during the eruption, and Mt. Somma … Continue reading “Excursion: Volcanism Southern Italy”
Geological excursion: explosive volcanism in the Mediterranean (Greece)