Where is Fossiliferous Sandstone found?
Sandstone with fossil inclusions (likely bivalve or brachiopod impressions)
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Open the appFossiliferous Sandstone occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Fossiliferous Sandstone
United States
Numerous locations, particularly in the Paleozoic and Mesozoic sedimentary basins. Examples include the Appalachian Basin (e.g., Devonian and Carboniferous sandstones), the Midcontinent (e.g., Pennsylvanian and Permian units), and the Western Interior Seaway deposits (Cretaceous).
United Kingdom
Common in various sedimentary sequences, such as the Jurassic limestones and sandstones of the Cotswolds and Yorkshire, and Carboniferous sandstones in northern England.
France
Present in Mesozoic and Cenozoic basins, particularly in marine sedimentary successions.
Australia
Found in various sedimentary basins, including those of the Great Artesian Basin and coastal regions with Mesozoic and Cenozoic deposits.
Canada
Occurs in the Western Canada Sedimentary Basin (e.g., Cretaceous units) and parts of the Appalachian region.
Collecting tips
- Look for Sedimentary Layers. Fossiliferous sandstones are found in layered sedimentary rock sequences. Examine outcrops, road cuts, and stream beds in areas known for sedimentary geology.
- Identify Marine Environments. Many fossiliferous sandstones form in ancient marine settings. Research geological maps for areas that were once shallow seas, deltas, or coastal plains.
- Examine for Textural Clues. Look for gritty, sand-sized grains and then carefully inspect the rock surface for visible shell fragments, impressions, or other organic remains. A hand lens can be very useful.
- Check for Biogenic Structures. Beyond body fossils, look for trace fossils like burrows, tracks, or trails, which also indicate biological activity within the sediment.
- Consult Geological Maps and Paleontological Guides. These resources can pinpoint specific formations and localities known for fossil occurrences in sandstone.
Quick Check
- Color:
- Variable (tan, gray, brown, red, white)
- Luster:
- Dull to earthy
- Streak:
- White (for quartz-rich varieties); may vary with cement or accessory minerals
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