Zerkowice Sandstone Sawn Cut Slabs, Tiles

It is extracted from the thirteenth century near the town Żerkowice 8 kilometers north of Lwowek Slaski. The origins of life have given natural outcrops of sandstone on the Bóbr in the area Żerkowice and in rock. Workings have an oblong sandstone gutter character due to the operation of sandstone with uplifted longitudinal ridges forming deposits. . Age is the upper Cretaceous sandstone - cognac 88-92 million years ago. The colors of these sandstones is variable, ranging from light beige yellowish, żółtawobeżową to brown. All of these colors can be coupled to form a colored mosaic or separately. High volatility due to the natural color tinges of iron oxides in different parts of the deposit. During the operation encounters, therefore, on the dark parts discolored and very bright. These sandstones form the shoals of varying thickness from 20 m in the vicinity of Kotliska and Rakowiczek to 80-90 m in the vicinity of the New Rural Grodzisk. Shoals are highly fractured vertically to form columns of different thicknesses. Natural blow among them the so-called. sandstones, which facilitates operation without the use of explosives, without destroying the deposit.
Sandstones of Żerkowice characterized by high resistance to basic parameters to be used in their construction, ie .:
- Compressive strength of 60 MPa
- Bending strength 5.6 MPa
- Total frost resistance - 48 cycles
- Resistance to HNO3, HCl, H2SO4 - 99.2%