Unusually small burrows, i.e., tiny tubes that run through the rock in a parallel arrangement ... the main component of marble. The fine powder remained behind. Passchier also found very similar ...
Unknown microorganisms used marble and limestone as a habitat Unusual structures of unknown origin found in rocks of desert areas Date: March 19, 2025 Source: Johannes Gutenberg Universitaet Mainz ...
Passchier also found very similar structures during field work in Oman and in Saudi Arabia—in Oman in limestone, while in the Saudi Arabian desert they were in marble.