Where is Coprolite found?

Coprolite 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 Coprolite

Collecting tips

1. Look for Sedimentary Environments. Focus your search in areas with exposed sedimentary rock layers, especially those known for fossil discoveries. Riverbeds, lakebeds, ancient marine deposits, and badlands are prime locations.
2. Identify Characteristic Shapes. Coprolites often retain a distinct, often elongated, cylindrical, or coiled shape. Look for objects that seem out of place with the surrounding rock matrix and have a consistent, non-random form.
3. Check for Inclusions. Break open or examine weathered surfaces for internal inclusions like bone fragments, scales, teeth, or plant matter. This is a strong indicator of a coprolite.
4. Consider the Context. Coprolites are often found in association with other fossils from the same ecosystem. If you find bones or teeth, there's a higher chance of finding coprolites nearby.
5. Distinguish from Concretions. Concretions are often spherical or irregularly shaped mineral growths that lack internal organic structures. Coprolites, while sometimes concretionary, typically show more organic-like forms and internal evidence of digestion.
6. Safety Precautions. Always obtain permission before collecting on private land. When collecting in the field, wear appropriate safety gear, including sturdy footwear and gloves. While coprolites themselves are generally safe to handle once fossilized, always wash hands after handling any geological specimens. Avoid ingesting dust or particles. No specific hazardous materials are typically associated with fossilized coprolites, but general fossil handling precautions apply.

Quick Check

Color:

Variable (black, brown, gray, tan, reddish-brown)

Luster:

Dull to earthy, sometimes waxy or vitreous

Streak:

White to light brown (if primarily phosphatic or siliceous), or matching the body color if rich in iron oxides or organic matter.

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