Salzhemmendorfer dolomite
Salzhemmendorfer dolomite , also known as Salzhemmendorfer Korallenoolith , was quarried as stone in Salzhemmendorf near Hameln in Lower Saxony. Lithostratigraphically, it belongs to the coral oolite of the north German Malm and originated in the Oxfordian (Lower Upper Jurassic ). Today, Salzhemmendorfer dolomite is no longer mined for use as natural stone , but for other purposes such as road construction and steel and glass production.
Occurrence
The occurrence ranges from Lübbecke , Minden , Lemgo to Braunschweig . It is a dolomitic limestone oolite . In the Braunschweig area this rock contains less sand than in other areas and occurs as purer limestone . The rock is up to 30 meters thick, up to 50 meters in the Weser area and 20 meters at the Porta Westfalica breakthrough . While around 10 quarries were active before the Second World War , only 2 were counted in 1951.
Rock description
The rock is a gray to gray-brownish fine-pored dolomite , a carbonate rock. An originally oolithic rock, which consisted of round mineral grains, was destroyed and again overprinted (compacted). In this process, a new rock was created that originally consisted of limestone corals.
The rock has a relatively large and visible pore space. The pores are 0.1 to 0.3 millimeters in size. But there are also larger pores (see illustration) in individual cases.
The surface of Salzhemmendorfer dolomite weathers outdoors, it can be loosened and bleached beige. Its weathering behavior is good.
use
This dolomite was mainly used as a solid building block, as floor slabs, stairs and window cornices in the outdoor area, but also for sculpture and for monuments and tombs. In the Bodenwerder and Eschershausen area , it was often used as a house base stone for monuments in cemeteries and also in other places in Lower Saxony, as it is very weather-resistant .
literature
- Wolf-Dieter Grimm: picture atlas of important monument rocks of the Federal Republic of Germany. Published by the Bavarian State Office for the Preservation of Monuments, Lipp-Verlag, Munich 1990, ISBN 3-87490-535-7 , Gesteins No. 187.
Web links
- Quarry in Salzhemmendorf on rheinkalk.de
- Image of the Salzhemmendorfer quarry: download on page 46
Individual proof
- ↑ Otto Sickenberg: stones and earth. The deposits and their management. Geology and Deposits in Lower Saxony , 5th volume Dorn-Verlag, Bremen, Horn 1951, pp. 274f and 276
Coordinates: 52 ° 3 ′ 24.5 ″ N , 9 ° 36 ′ 18.1 ″ E