For most organisms on Earth, rocks are objects, not food. But for one oddball microbe, desert limestone seems to have been on ...

Chalk, limestone, shale, and sandstone are all examples of sedimentary rocks. All these different sedimentary rocks are formed from the broken remains of other rocks that become joined together.

Mudstone, shale, and limestone are examples of sedimentary rock likely to ... Throughout the earth's history, each of the three rock types has been continuously formed and recycled into other types of ...

Unusually small burrows, i.e., tiny tubes that run through the rock in a parallel arrangement from top to bottom, were discovered in marble and limestone of these desert regions. The paper is ...

Fungi can bore through rocks and leave behind tubes, and some types of cyanobacteria also thrive off limestone or marble. It is unlikely that the mystery organisms were cyanobacteria—they need ...