Volcanic ash
The long headland of Saltstein comprises alternating layers of lava and volcanic ash. The lava is in the form of dark types of rock with white flecks. The white flecks were originally gas-filled bubbles. Volcanic ash can be seen in layers between individual layers of lava; it is often very stratified and green or brownish in colour. The ash resulted from volcanic eruptions. In the far west of Saltstein, there is an approximately thick layer of fragments of rock of various sizes. This layer was created in a massive volcanic eruption. Molten basalt and rhomb porphyry forced its way up through the volcano after the lava had overflowed. These substances can be seen as east-west corridors on Saltstein.