sedimentary

Fossiliferous Limestone (Murchisonia/Gastropod Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

AI-generated identification · may be incorrect

Hardness: 3 (Mohs scale), Color: Gray to brownish-gray with white/off-white fossil inclusions, Luster: Dull to earthy, Structure: Fine-grained matrix with fossilized shell fragments. Microcrystalline texture.

Identified June 24, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed in shallow marine environments through the accumulation of calcium carbonate and marine organism remains. These specimens from the Burgenland/Vienna Basin region (47.7°N, 16.5°E) are likely Leithakalk (Leitha Limestone) from the Miocene epoch, roughly 10-16 million years old.

Uses & applications

Primarily used as a decorative building stone locally (St. Margarethen quarry nearby), in the production of lime, cement, and as a popular subject for local fossil collectors.

Geological facts

The region near Eisenstadt and Lake Neusiedl is famous for the Leitha Limestone, which was used to build many of Vienna's most famous historic buildings, including St. Stephen's Cathedral and the State Opera.

Field identification & locations

Identify in the field by looking for circular or spiral white patterns (cross-sections of gastropod shells) in a gray matrix. It will react and bubble (effervesce) when exposed to a weak acid like vinegar due to its calcite content.