Baruther Maar
The Baruther Maar is a hidden volcanic maar east of Baruth near Bautzen . Another buried dry maar is located 5 kilometers north near Kleinsaubernitz .
Location and access
The Baruther Maar is located about 800 meters east of the center of Baruth. It has a diameter of about 1200 meters. A geopath called “Baruth's hot past” leads over seven stations to the edge of the maar, over which there is now an agricultural area.
discovery
The Baruther Maar has been covered by younger layers and sediments that are up to 207 meters thick in the course of the earth's history. It is therefore not visible at first glance in today's landscape. While searching for raw materials, a negative gravity anomaly was discovered here during gravimetric regional surveys of the GDR. It was suggested that the cause could be a hidden maar. The distance between the measuring points was 500 meters, which is why the center of the anomaly could not be precisely determined. In 1996, therefore, compaction measurements were carried out, which ultimately determined the center of the maar. A research well was sunk here in 1998. The evaluation of the drill cores confirmed that it was a maar. Furthermore, a section of the geological and palaeontological history of Lusatia could be traced.
Emergence
The Baruther Maar was formed around 28 million years ago in the Tertiary by a phreatomagmatic explosion at a depth of 300 meters when magma came into contact with groundwater. The outbreak only lasted a few weeks. The explosion crater then filled with water and formed an outflow-free lake, which was around 250 meters deep at its deepest point. In a slow process, sediments filled the crater and the lake silted up.
Individual evidence
- ↑ http://user.uni-frankfurt.de/~nickbagd/Gravimetrie-2005/gabriel_2003.pdf
- ↑ http://www.geologie.sachsen.de/die-forschungsbohrung-baruth-14319.html
Web links
- Signs of the geopath "Baruth's hot past"
- Maare - a form of tertiary volcanism in Upper Lusatia that was unknown for a long time
- Saxon State Office for Environment, Agriculture and Geology Geoppath "Baruth's hot past"
Coordinates: 51 ° 13 ′ 29 ″ N , 14 ° 35 ′ 32 ″ E