Understanding geology is critical to studying paleontology because fossils ... Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils. As the layers of sediment ...

Menu Local Geology History, Resources ... The great number of fossils shows the nature of life in benthic communities in the Ordovician ocean. The layers of Ohio's bedrock are slightly tilted, with ...

The northern plains of Mars, marked by thousands of mounds and hills, hold significant evidence of the planet's watery past.

Menu Local Geology History, Resources ... that is. Our local limestone layers reflect times of relative prosperity for the wide variety of marine invertebrates living in a warm, shallow sea that ...

John Wesley Powell A professor of geology at Illinois Wesleyan, John Wesley Powell had more than just a passing interest in the layers upon layers of rocks exposed by the Colorado River.

that cut across layers after the rocks were deposited. This is the principle of cross-cutting relationships. The principle states that any geologic features that cut across strata must have formed ...

The geological timelines add another layer of evidence against the dinosaur-oil myth. While most dinosaur species roamed the Earth between 230 and 66 million years ago, the organic material ...