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Concretion

earth science Maturity 7-9

Some rocks are very hard.

MoerakiBouldersSunrise.jpg
MoerakiBouldersSunrise.jpg
They grow in the ground. They can look like round balls. Sometimes they hide a fossil inside.
Concretion rock from Middle Jurassic of Iran.jpg
Concretion rock from Middle Jurassic of Iran.jpg
These rocks are special. Can you find a round rock?

34 words
🖼️ Images & Media (16)
File:Конкреции в Западном Казахстане. Concretions. Western Kazakhstan.JPG
Конкреции в Западном Казахстане....
File:Konkrece Geologická zahrada DP Praha 2017 2.jpg
Konkrece Geologická zahrada DP Praha 2017 2.jpg
File:Marlstone aggregate concretion (Sault Ste. Marie, Michigan, USA.JPG
Marlstone aggregate concretion (Sault...
File:Concretion_rock_from_Middle_Jurassic_of_Iran.jpg
Concretion_rock_from_Middle_Jurassic_of_Iran.jpg
File:Rock concretions from Hells Hollow State Park, Pennsylvania.jpg
Rock concretions from Hells Hollow State...
File:Concretions embedded in sandstone in Anza Borrego Desert State Park in California.jpg
Concretions embedded in sandstone in Anza...
File:Vaqueros Sandstone Sanborn County Park.jpg
Vaqueros Sandstone Sanborn County Park.jpg
File:07-ml-3-soil-mosaic-B019R1 br.jpg
07-ml-3-soil-mosaic-B019R1 br.jpg
File:MoerakiBouldersSunrise.jpg
MoerakiBouldersSunrise.jpg
File:Septarian Nodule.jpg
Septarian Nodule.jpg
File:Bowling Balls Beach 2 edit.jpg
Bowling Balls Beach 2 edit.jpg
File:OrdovicianEdrio.jpg
OrdovicianEdrio.jpg

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📚 Content adapted from Wikipedia | Readability: FK 14.0 | Vital Level 5