Geology: Rock Types and Age Determination

Flashcards covering key terms related to rock types, relative dating techniques, the Law of Superposition, and the importance of determining rock age.

Rock Age Determination

The methods scientists use to describe the age of rocks and other materials, either by determining their exact age or by comparing them with other rocks.

Geological Events History

One of the key reasons determining the age of rocks is important, as it helps reveal the history of geological events.

Rate of Geological Processes

A key reason for determining rock age, which enables scientists to measure the speed at which geological processes occur.

Earth's Interior Behavior

An aspect of geology understood by determining rock age, which provides insight into the behavior of Earth's interior.

Natural Hazards Preparation

An application of determining rock age, which aids scientists in understanding how to prepare for possible natural hazards.

Convergent Boundaries

Plate boundaries where a denser plate moves beneath a less dense plate.

Law of Superposition

A foundational geological principle stating that lower rock layers are usually older, while the layers above them are younger.

Relative Dating

A dating technique that allows scientists to determine the relative age of rocks and geologic structures based on layer arrangements.

Igneous Rocks

Rocks formed when magma or lava cools and hardens, an example of which is granite.

Sedimentary Rocks

Rocks formed when sediments settle, pile up, compact, and cement together, with examples including sandstone, limestone, and shale.

Metamorphic Rocks

Rocks formed when existing rocks are changed by heat and pressure, with examples including marble, slate, and gneiss.