Carters Beach NZ Fossiliferous Limestone – 581 g (130 × 51 × 110 mm)

This 581 g fossiliferous limestone specimen originates from Carters Beach, West Coast, New Zealand.
It displays muted grey coloration, opaque preservation, and a highly irregular surface marked by cavities, bioerosion, and embedded fossil fragments — primarily marine invertebrates. Dimensions are 130 × 51 × 110 mm.
Geological Age
This limestone formed tens of millions of years ago in a shallow marine environment, gradually accumulating biological debris and sediment.
The visible fossils and bioerosion features reflect ancient life and the dynamic interactions between organisms and substrate over geological time.
Technical notes
• Hardness: ~3–4 (calcite dominant)
• Luster/Finish: Dull to earthy
• Transparency/Preservation: Opaque; fossil inclusions and bioerosion cavities preserved
• Fossil type: Marine invertebrates (shell fragments, burrows, bioerosion traces)
• Morphology: Irregular, porous matrix with embedded fossils
• Associations / Matrix: Fossils within limestone matrix; signs of biological erosion
• Composition / Formation: Calcium carbonate sedimentary rock formed via marine deposition
• Fluorescence: None expected
This piece is unpolished, preserving its natural character and making it suitable for display, study, or collection.