Unusually small burrows, i.e., tiny tubes that run through the rock in a parallel arrangement ... may have bored the tunnels to use nutrients present in the calcium carbonate, the main component of ...

"We noticed strange structures in this marble that were not the result of ... Endolithic microorganisms use rock as a basis for life Microorganisms such as bacteria, fungi, or lichen are found ...

Marble is another hard rock. It has an attractive texture and colour and it can be cut and polished. Because of this, it is used to make floor tiles and wall tiles. Some statues are made from ...

Unusually small burrows, i.e., tiny tubes that run through the rock in a parallel ... the tunnels to use nutrients present in the calcium carbonate, the main component of marble.