Fossil leaf prints are biological impressions of ancient foliage preserved in fine-grained sedimentary rock. They are typically found in layers of shale or siltstone and provide a clear, two-dimensional record of the plant's venation and overall shape. Collectors should look for specimens with sharp, crisp margins where the leaf detaches cleanly from the surrounding rock matrix.
Is this fossil leaf prints?
4-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch fossil leaf prints with a known reference. Fossil Leaf Prints sits at Mohs 2-4 — softer than the next harder reference, harder than the previous one.
- 2Read the lusterHold the specimen under a strong light. Fossil Leaf Prints typically shows a dull luster.
- 3Match the color rangeCompare against the expected color range: brown, tan, black, gray.
- 4Look at form & habitTypical habit: imprint.
Often found alongside fossil leaf prints
Minerals reported to co-occur with fossil leaf prints. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Mohs hardness
- 2-4
- Luster
- Dull
- Transparency
- Opaque
- Crystal habit
- Imprint
- Rarity
- Common
- Uses
- Collector, Scientific Research, Decorative
- Host rock
- Sedimentary Shale and Siltstone
- Typical price
- $5-100 depending on detail and rarity
Where rockhounds find fossil leaf prints
1 mapped spotsClassic worldwide localities
- Green River Formation, USA
- Florissant Fossil Beds, USA
- Messel Pit, Germany
- Carboniferous coal measures, UK
Field-hunting tip
Look in sedimentary shale and siltstone country — that is the host setting where fossil leaf prints typically forms. If you start seeing clay minerals, siltstone, shale in float, you are in the right ground. Field specimens usually show a imprint habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in Texas — start trip planning there.
Common questions
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Find fossil leaf prints on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
