Montana relative age dating
The darker rock that cuts vertically through the layers of sandstone is type of igneous rock formed as magma solidified beneath the surface. In other words, relative to (compared to) the igneous rock, the sandstone is older. For example a crack through part of a sidewalk could have only happened after the sidewalk was built. Geologists have determined the igneous rocks in the Cascade area solidified about 75 million years ago.These types of igneous formations, called dikes, are common in the Cascade area. This is called the principle of cross-cutting relationships . Based on this absolute age of the igneous rock, its fair to say that the sandstone shown in the photo is over 75 million years old.Much of the Earth's geology consists of successional layers of different rock types, piled one on top of another.The most common rocks observed in this form are sedimentary rocks (derived from what were formerly sediments), and extrusive igneous rocks (e.g., lavas, volcanic ash, and other formerly molten rocks extruded onto the Earth's surface).The example used here contrasts sharply with the way conventional scientific dating methods are characterized by some critics (for example, refer to discussion in "Common Creationist Criticisms of Mainstream Dating Methods" in the Age of the Earth FAQ and Isochron Dating FAQ).A common form of criticism is to cite geologically complicated situations where the application of radiometric dating is very challenging.
Individuals aged 15 or younger in Montana are not legally able to consent to sexual activity, and such activity may result in prosecution for statutory rape.As an example of how they are used, radiometric dates from geologically simple, fossiliferous Cretaceous rocks in western North America are compared to the geological time scale.To get to that point, there is also a historical discussion and description of non-radiometric dating methods.The Family Educational Rights and Privacy Act of 1974 (FERPA) grants students certain rights, privileges, and protections relative to individually identifiable student educational records that are maintained by Montana Western.Specifically: FERPA permits the release of directory-type information to third parties without written consent of the student provided the student has been given the opportunity to withhold such disclosure.
Geochronologists do not claim that radiometric dating is foolproof (no scientific method is), but it does work reliably for most samples.