1 / 13

Relative Age

Relative Age. The age of a rock unit or event relative to the age of another rock unit or event. In other words which layer or event came first , second , third … Ex. Mr. Jensen is older than you are or the sandstone was deposited before the fault occurred. Absolute Age.

tobit
Download Presentation

Relative Age

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Relative Age • The age of a rock unit or event relative to the age of another rock unit or event. • In other words which layer or event came first, second, third… • Ex. Mr. Jensen is older than you are orthe sandstone was deposited before the fault occurred

  2. Absolute Age • An actual year or a range of years (sometimes expressed as a geologicperiod) • Can be determined with radiometric dating • Can be determined with the use of Index Fossils and Volcanic Time Markers

  3. Index Fossils • Index fossils (like fads) can help us determine the specific time period that the rock formed • The best index fossils are those that lived for a relatively short period of time and over a largearea.

  4. Volcanic Time Markers • Volcanic ash is sent into the upper atmosphere and is carried all over the Earth • Layers of volcanic ash are created all over the Earth. • They can be linked to the eruption and dated

  5. Not every Fossil is an Index Fossil • Some fossils are not useful for determining the age of a rock because they … • Lived for too long a period of time • Too small of an area

More Related