Fossil and Rock Layers

Front

What was the name of the supercontinent that existed millions of years ago?

Back

Pangea

Front

In geological layers, which layer is typically the youngest?

Back

The topmost layer (often referred to as 'O').

Front

In a sequence of rock layers, how can you identify the oldest layer?

Back

The oldest layer is usually at the bottom of the sequence (often referred to as 'R').

Front

What type of rock forms from the accumulation of sediments?

Back

Sedimentary rock.

Front

What does fossil evidence of the same reptile found in different continents suggest?

Back

It supports the theory that all continents were once connected.

Front

What is the principle of superposition in geology?

Back

In an undeformed sequence of sedimentary rocks, the oldest layers are at the bottom and the youngest are at the top.

Front

What is the significance of index fossils in dating rock layers?

Back

Index fossils are used to identify and date the relative age of rock layers because they were widespread but existed for a short period.

Front

What is the process of lithification?

Back

Lithification is the process by which sediments compact under pressure and cement together to form sedimentary rock.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the sequence of events, while absolute dating provides a specific age or date for an event or rock layer.

Front

What role do tectonic plates play in the formation of rock layers?

Back

Tectonic plates can cause uplift, folding, and faulting, which affect the arrangement and formation of rock layers.