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Geology - Unconformities Flashcards

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Questions and Answers

What is an unconformity?

A surface that shows a break in deposition.

What are the types of unconformity?

Nonconformity

Angular Unconformity

Disconformity

All of the above (correct)

What is an angular unconformity?

An unconformity in which the older strata sit at a different angle than the younger strata.

What is a disconformity?

A gap in deposition during which erosion occurs. Signup and view all the answers

What is a nonconformity?

An unconformity in which older metamorphic or intrusive igneous rocks are overlain by younger sedimentary strata. Signup and view all the answers

Which type of unconformity involves sedimentary and non-sedimentary rock?

Nonconformity. Signup and view all the answers

Where did James Hutton discover unconformity?

Siccar Point, Scotland. Signup and view all the answers

Study Notes

Unconformities in Geology

An unconformity is a surface indicating a break in sediment deposition.
There are three main types of unconformities: Nonconformity, Angular Unconformity, and Disconformity.

Types of Unconformity

Angular Unconformity involves older rock layers tilted at different angles compared to the overlying younger layers.
Disconformity refers to a gap in deposition characterized by erosion, often leading to a hiatus in the geological record.
Nonconformity occurs when younger sedimentary rocks rest on older metamorphic or intrusive igneous rocks.

Notable Geological Sites

Siccar Point, Scotland is a significant location where James Hutton identified unconformity and developed the principle of uniformitarianism, emphasizing the continuity of geological processes over time.

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Description

Test your knowledge on different types of unconformities in geology with this set of flashcards. Each card provides definitions and examples to help you understand the concepts better. Perfect for students who want to grasp the fundamentals of geological time and deposition processes.