There are three main types of rock: igneous rock ... Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils. As the layers of sediment build up on top of one another ...

As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils ... in rocks and organic matter (e.g., wood, bones, and shells) can contain radioactive ...

Trovants are rocks that grow by absorbing minerals from rainwater. Romania is home to a cluster of trovants that inspired folklore of dinosaur eggs, plant fossils and alien creations.

However, most interestingly, in 2017, it was reported that the rocks may contain what is yet ... would be a good proxy for the kind of environment. The fossils, or, more technically speaking ...

A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type ... soft grey rock with visible layers. It often contains fossils and ...

As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils ... in rocks and organic matter (e.g., wood, bones, and shells) can contain radioactive ...