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Basalt-Sphäroid am Kutzenberg, Königswinter, NRW, Germany
Posted by: Groundspeak Premium Member argus1972
N 50° 40.840 E 007° 12.549
32U E 373480 N 5615844
Quick Description: The basalt columns of this spheroid are aimed arched-shaped on a centre. Thus originates the impression of a rosette.
Location: Nordrhein-Westfalen, Germany
Date Posted: 8/11/2017 1:59:45 AM
Waymark Code: WMWBZZ
Published By: Groundspeak Regular Member GCEdo
Views: 3

Long Description:
In the south slope of the "Petersberg" this basalt spheroid is located. It is an unusual variant of basalt columns from the volcano time.

To the history of the origin there are several explanations. The thesis is most plausible that there was a crater with liquid lava at "Kutzenberg" 28 – 22 million years ago. This lava lake numb and contracted itself increasingly.

Parallel basalt columns originate in general from cooling the liquid lava vertically to the cooling surface. Basalt columns originate after the solidification of the glazes by the progressive cooling of the very hot rock. The cooling advances from the exterior surface of the basalt body to the inside. If the exterior surface of the basalt is level, parallel columns originate. If the exterior surface is bent, the columns are arranged shaped like a folding fan.

This could have been the case here. In the "Kutzenberg"-crater the crooked wall of the crater served as a cooling surface and led accordingly to a crooked arrangement of the basalt columns.
In the course of millions of years the crater disappeared by erosion and left behind the hard basalt core with its bent columns.

The basalt rosette is located in a closed nature reserve. The area is protected with fences and may be visited only twice a year within the scope of a public guidance.
Waymark is confirmed to be publicly accessible: no

Access fee (In local currency): .00

Requires a high clearance vehicle to visit.: no

Requires 4x4 vehicle to visit.: no

Public Transport available: no

Website reference: [Web Link]

Parking Coordinates: Not Listed

Visit Instructions:
No specific requirements, just have fun visiting the waymark.
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