This article needs additional citations for verification. (October 2023) |
The Rodderberg is an extinct volcano in the east of the municipality of Wachtberg near Bonn, Germany.[1] The last eruption was 250,000 years ago.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Totale_vom_Rodderberg.jpg/220px-Totale_vom_Rodderberg.jpg)
It is situated just above the Rhine valley. Together with the Drachenfels directly opposite, the Rodderberg narrows the Rhine valley. This gorge portion is the southern limit of the lowland-bay of Cologne.
The Rodderberg offers views to the Siebengebirge, the Rhine valley and up to the Cologne Cathedral, about 50 km away.
Geology
editThe Rodderberg detonated in a phreatomagmatic eruption about 250,000 years ago. This happened when the magmatic plume reached the groundwater level of the Rhine (about 50 m higher than today). After the explosion, the crater was filled with water that formed a maar of about 90 m depth.[citation needed] In the last 250,000 years[citation needed] this feature filled with dust and soil until it was filled up to today's level.[2]
The Rodderberg is now a small hill that has a shallow concave shape.
References
edit- ^ Ian Smalley (2020). Leonard Horner in Bonn 1831–1833, finding loess and being incorporated into Lyell's Loess Legion. Geologos 26 (2): 163–170 doi:10.2478/logos-2020-0014
- ^ Patrick Schläfli et al. (2023). New vegetation history reconstructions suggest a biostratigraphic assignment of the lowermost Rodderberg interglacial (Germany) to MIS 11. Quaternary Science Reviews 302: 107932 doi:10.1016/j.quascirev.2022.107932