fossil

Fossil plant impression, likely fern or leaf

Indeterminate fossilized vascular-plant compression; possibly a fern frond or other Paleozoic plant

AI-generated identification · may be incorrect

A dark, branching carbonaceous impression occurs in a pale, fine-grained sedimentary slab, likely shale or siltstone. Matrix hardness is roughly Mohs 2–4, with dull to slightly earthy luster and thin fissile layering; the fossil itself is not identifiable to species from the image.

Identified August 13, 2026More fossil →

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At a glance

Common name: Fossil plant impression, likely fern or leaf
Scientific name: Indeterminate fossilized vascular-plant compression; possibly a fern frond or other Paleozoic plant
Category: fossil
Identified: August 13, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common unattributed fragment; $50–$300+ if complete, well-preserved, legally collected, and locality-documented.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Plant material was buried in quiet water, compressed, and preserved as a carbon film or mineral impression during diagenesis. Geological age cannot be determined visually, but similar specimens range from Paleozoic to Mesozoic strata.

Uses & applications

Primarily a teaching, display, and collecting specimen; scientifically important fossils should be documented and curated rather than commercially prepared.

Geological facts

Branching geometry may represent a fern, horsetail, twig, or root, and apparent morphology can be distorted by splitting along bedding planes.

Field identification & locations

Look for bedding-parallel carbon films, repeated veins or branching axes, and a fine shale matrix; avoid acids and excessive cleaning. Identification requires locality and stratigraphic information, commonly from coal measures and other lake or floodplain deposits.