Where is Ammonite Fossil found?
Ammonoidea (fossilized)
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Open the appAmmonite Fossil 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 Ammonite Fossil
United Kingdom
Famous for Jurassic and Cretaceous ammonites, particularly along the Jurassic Coast in Dorset and Yorkshire.
Madagascar
Known for beautifully preserved and often iridescent (ammolite-like) ammonites from the Cretaceous period.
Canada (Alberta)
Source of ammolite, a gem-quality iridescent ammonite shell material, primarily from the Bearpaw Formation.
United States
Various states, including Texas, Montana, South Dakota, and California, yield ammonite fossils from different geological periods.
Germany
Notable for Triassic and Jurassic ammonites, especially from the Posidonia Shale.
Russia
Extensive deposits of ammonites from various periods, particularly in the Volga region.
Collecting tips
- Target Sedimentary Rocks. Focus on marine sedimentary rock formations, especially shales, limestones, and marls, which are most likely to preserve marine fossils like ammonites.
- Look for Outcrops and Exposures. Search in natural exposures such as sea cliffs, riverbanks, road cuts, and quarries where rock layers are visible and weathering has exposed fossils.
- Identify Key Features. Look for coiled shell shapes, suture patterns, and ribbed or ornamented surfaces. Even fragments can be diagnostic.
- Tools and Safety. Bring appropriate tools like a geological hammer, chisels, safety glasses, and a sturdy bag. Always prioritize safety, especially near cliffs or unstable ground. Obtain permission before collecting on private land.
- Research Local Geology. Consult geological maps and paleontological guides for specific areas to understand which formations are present and what types of fossils are typically found there.
Quick Check
- Color:
- Variable (brown, grey, black, white, yellow, red, iridescent)
- Luster:
- Variable (dull, earthy, metallic, pearly, iridescent)
- Streak:
- Not applicable for the fossil itself; depends on the mineral infilling (e.g., white for calcite, black for pyrite).
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