Uncover Earth's Layers

The process is called layering or coating.

The term used in geology is relative dating.

The layers of rock represent a record of time passing, with each layer corresponding to a different point in history.

<p>Relative dating is a method used to determine the age of rock layers based on their position in relation to other layers. It helps establish the sequence of events and the relative ages of the rocks. The general rule is that the older layers are found at the bottom and newer layers are found at the top.</p> Signup and view all the answers

<p>Intrusions are molten rocks that force their way into preexisting rock layers. They occur when magma rises to the surface and melts through the existing layers. This process can form intrusive rocks like batholiths, sills, dikes, and laccoliths. Intrusions can disrupt the original sequence of the rock layers.</p> Signup and view all the answers

<p>Faults are breaks in rocks where the layers can slide past each other. When faults occur in rock layers, they can cause the layers to shift and slide, disrupting the original sequence. Faults can create gaps or overlaps in the layers.</p> Signup and view all the answers

<p>A fault is a break in the rocks where the layers can slide past each other. It changes the way the layers appear in the picture by shifting them up or down.</p> Signup and view all the answers

<p>Both faults and cracks in a sidewalk break up the layers that were already laid down.</p> Signup and view all the answers

<p>The intrusion in the diagram is shown in gray and labeled D. It happened after the bottom layers C and B were fully formed, as it cuts through both layers.</p> Signup and view all the answers

<p>The intrusion actually goes through the A layer first, then after it's cooled, the fault happens and the intrusion is moved along with all the other layers. If the fault had happened first, the intrusion would not have been split like we see in the picture.</p> Signup and view all the answers