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Where is Ammonite Fossil found?

Ammonoidea (subclass)

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Ammonite 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

Jurassic Coast, England

A UNESCO World Heritage Site renowned for its abundant and well-preserved ammonite fossils, particularly from the Jurassic and Cretaceous periods.

Madagascar

Famous for beautifully preserved, often iridescent, and large ammonite fossils, frequently found in limestone and shale deposits.

Alberta, Canada

Home to the unique iridescent ammonite shell material known as Ammolite, found in the Bearpaw Formation.

Germany

Various localities, such as Holzmaden, are known for exceptionally preserved ammonites, often with soft tissue impressions.

United States (e.g., Texas, Montana, South Dakota)

Numerous localities yield ammonite fossils, particularly from Cretaceous marine deposits.

Collecting tips

  1. Target Sedimentary Rocks. Focus your search on marine sedimentary rock outcrops, especially shales, limestones, and marls, which are the primary hosts for ammonite fossils.
  2. Look for Distinctive Shapes. Keep an eye out for coiled, spiral shapes, or fragments exhibiting the characteristic ribbing or suture patterns of ammonites.
  3. Check Weathered Surfaces. Fossils often become more visible on weathered rock surfaces where the surrounding matrix has eroded away, exposing the harder fossil.
  4. Research Local Geology. Before going into the field, research the geological maps and paleontological reports for your chosen area to identify formations known to contain ammonites.
  5. Tools and Safety. Bring appropriate tools such as a geological hammer, chisels, safety glasses, and gloves. Always prioritize safety and obtain permission before collecting on private land.

Quick Check

Color:
Variable (grey, brown, black, white, yellow, red, iridescent)
Luster:
Variable (dull, vitreous, pearly, iridescent)
Streak:
Not applicable (fossil, not a mineral)

Explore Ammonite Fossil

Overview

Full guide to Ammonite Fossil

Identification

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