Where is Trilobite Fossil found?
Trilobita (class)
Got a photo? Identify rocks instantly with the Rockby app
Open the appTrilobite 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 Trilobite Fossil
Morocco (Anti-Atlas Mountains)
Renowned for exceptionally well-preserved and diverse trilobite fossils, particularly from the Cambrian and Devonian periods. Many large and spiny forms are found here.
United States (Utah, New York, Ohio, Oklahoma)
Various states yield significant trilobite finds. Utah's Wheeler Shale (Cambrian) is famous for Elrathia kingii. New York's Silurian and Devonian strata produce diverse species, including Phacops. Ohio and Oklahoma also have notable Devonian trilobite localities.
Canada (British Columbia, Newfoundland)
The Burgess Shale in British Columbia (Cambrian) is world-famous for its exceptional soft-bodied preservation, including some trilobites. Newfoundland also has important Cambrian localities.
Czech Republic (Barrandian area)
Historically significant region for Ordovician and Silurian trilobites, particularly those studied by Joachim Barrande.
Russia (St. Petersburg region)
Known for well-preserved Ordovician trilobites, often found in limestone nodules.
Collecting tips
- Target Sedimentary Rocks. Focus your search on marine sedimentary rock outcrops, particularly shales, limestones, and fine-grained sandstones of Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian age. Avoid igneous and metamorphic rocks.
- Look for Distinctive Shapes. Trilobites have a characteristic three-lobed, segmented body plan. Look for these distinctive outlines, even if partially exposed. Eyes, cephalon, and pygidium are often good indicators.
- Split Shale Layers. Many trilobites are found in shale. Carefully split layers of shale along their bedding planes using a rock hammer and chisel. Fossils often lie flat on these surfaces.
- Examine Limestone and Sandstone. In limestone, trilobites may appear as darker or lighter outlines, or as three-dimensional molds and casts. In sandstone, they might be preserved as impressions or silicified remains. Look for subtle changes in texture or color.
- Check Weathered Surfaces. Weathering can sometimes expose fossils more clearly by eroding the softer matrix rock. Examine weathered rock faces and scree slopes below outcrops.
- Consult Geological Maps and Guides. Research local geology and known fossil localities. Geological maps can pinpoint areas with appropriate rock formations and ages. Field guides often provide specific collecting tips for regions.
- Safety Precautions. Always wear appropriate safety gear, including eye protection, gloves, and sturdy footwear. Be aware of unstable slopes and falling rocks. Obtain permission before collecting on private land and adhere to regulations on public lands.
Quick Check
- Color:
- Variable (dark gray, black, brown, reddish-brown, tan, white) depending on matrix and preservation.
- Luster:
- Dull to earthy (most common), vitreous (silicified), or metallic (pyritized).
- Streak:
- Not applicable, as it is a fossilized organism, not a mineral with a consistent streak.
Explore Trilobite Fossil
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.