noun
- Plural of glauconite; greenish mineral grains composed of hydrous silicates of iron and potassium, commonly found in marine sedimentary rocks.
Usage: geology; technical
Examples
- The sandstone sample contained abundant glauconites, indicating a shallow marine depositional environment.
- Geologists identified glauconites in the core samples from the offshore drilling site.
- The green color of the sediment was due to the presence of glauconites.
- Glauconites are useful for dating sedimentary sequences in paleontological studies.