How are cross cutting relationships used in relative dating Free meet and free chat sex


11-Apr-2018 23:39

The principle of cross-cutting relationships pertains to the formation of faults and the age of the sequences through which they cut.

Faults are younger than the rocks they cut; accordingly, if a fault is found that penetrates some formations but not those on top of it, then the formations that were cut are older than the fault, and the ones that are not cut must be younger than the fault.

A similar situation with igneous rocks occurs when xenoliths are found.Due to that discovery, Smith was able to recognize the order that the rocks were formed.Sixteen years after his discovery, he published a geological map of England showing the rocks of different geologic time eras.Relative dating by biostratigraphy is the preferred method in paleontology and is, in some respects, more accurate.

The Law of Superposition, which states that older layers will be deeper in a site than more recent layers, was the summary outcome of 'relative dating' as observed in geology from the 17th century to the early 20th century.

In geology, when an igneous intrusion cuts across a formation of sedimentary rock, it can be determined that the igneous intrusion is younger than the sedimentary rock.