Amusing Planet explains they are an natural phenomena even though they look manufactured and they're too old for human technology so that means aliens made them.
These spheres are actually concretion formed by the precipitation of volcanic sediments, ash, or both, after they accumulated 3 billion years ago.
The most striking are nearly spherical while there are other oval shapes. The latitudinal ridges and grooves are also natural and are shown on other types found elsewhere.
More examples at the link.
More photos on Duckduckgo. [
spherical calcareous concretions]
Duckduckgo [
Moqui marbles, Moeraki Boulders]
2 comments:
“Dorp” and “dal” suffixes to belie Afrikaans.
Prehistoric bocce ball or kidney stone from a giant sloth - that is the question.
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