Dating Rock Layers & Fossils

Front

What does the Principle of Superposition state?

Back

In an undisturbed sequence of rock layers, the oldest layer is at the bottom and the youngest layer is at the top.

Front

What is a fault in geological terms?

Back

A fault is a fracture or zone of fractures between two blocks of rock, which allows for the movement of the blocks.

Front

In which type of rock are fossils generally NOT found?

Back

Fossils are generally not found in granite, as it is an igneous rock that forms from cooled magma.

Front

What geological process is indicated by erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural processes such as wind or water flow.

Front

What is the youngest layer in a rock outcrop labeled 'A'?

Back

Layer 'A' is the youngest layer in the outcrop.

Front

What is the significance of the Law of Original Horizontality?

Back

The Law of Original Horizontality states that layers of sediment are originally deposited horizontally under the action of gravity.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the age of rocks and fossils in relation to one another, while absolute dating provides a specific age or date.

Front

What is an unconformity in geology?

Back

An unconformity is a surface of contact between two groups of unconformable strata, indicating a gap in the geological record.

Front

What type of rock is most likely to contain fossils?

Back

Sedimentary rock is most likely to contain fossils, as it forms from the accumulation of sediment and organic material.

Front

What does the term 'strata' refer to in geology?

Back

Strata refer to layers of sedimentary rock or soil with internally consistent characteristics that distinguish them from other layers.