Concretion
A variety of Sedimentary
Common
What is Concretion?
Concretion refers to a geological formation characterized by a hard compact mass found in sediments or sedimentary rocks. It occurs through the precipitation of mineral cement, often nucleating around a pebble, fossil, or organic matter. Due to its characteristic shape, this material was often misunderstood and mistaken for fossilized eggs, turtle shells, bones, or even extraterrestrial debris.
Concretion Market Value Calculator
Estimate the market value of Concretion using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Concretion Localities Map
See where Concretion is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
More Images
© NASA/JPL/Cornell/USGS
© Amir Ali Iranshahi 3
Quick Facts
Physical Properties
- Color
- Various colors, often brown, grey, black, red, yellow
Also Known As
ConcretionIronstone Concretion
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