Geology AS Revision Unit 1

Created by: Chris
Created on: 12-03-11 19:47

How old is the Solar System?

4600 million years

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After a Meteorite Impact, what is the name given to the inverted rock?

Impact Ejecta

2 of 24

What sequence of Rocks make up the oceanic crust?

Basalt, Dolerite, Gabbro

3 of 24

Is the Density of Oceanic Crust 2.7g/cm3?

False

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Where is the Mohorovicic Discontinuity located?

35km between the crust and upper mantle

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What percentage of the Asthenosphere is partially melted?

6 of 24

Where is the P and S Shadow zone from the epicentre after an earthquake?

103" - 142"

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Can Magnetic Stripes found in the ocean crust be used as evidence for Sea Floor Spreading?

True

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At what depth do S waves stop moving?

2900km

9 of 24

What is the name of the zone in a subducting plate where the most Earthquake Focus' are?

Benioff

10 of 24

What is the scale called that is measured on the observed intensity of an Earthquake?

Mercalli

11 of 24

What device measures the ground motion?

Seismometer

12 of 24

What are hotspots?

Volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the mantle elsewhere.

13 of 24

What is the average age of Oceanic Crust?

200 million years

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What is the average age of Continental Crust

4000 million years

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What is a Seamount?

An underwater Volcano at sea level

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Where is the Ring of Fire, and what is it?

A ring of volcanos surrounding the Pacific Plate

17 of 24

When did the K-T impact event occur?

65 million years ago

18 of 24

What is a large body of magma called?

Batholith

19 of 24

What are Xenoliths

Angular Fragments of Bed rock in a magma Body

20 of 24

In what direction does slate cleave?

at 90" to the direction of stress

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You are stood on a fold's axial plane trace. The rock layers dip away from you at 60" and 30" what kind of fold is it?

An Asymmtric Antiform

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You are at a tear fault. The bed rock seems to have been displaced to the right, what type of tear fault is it?

Dextral Tear Fault

23 of 24

Is it a Dome or a Basin when the rock dips towards you?

Basin

24 of 24

Comments

Max

Report Fri 18th March, 2011 @ 14:11

This is a great starting point for revising unit 1 and it helps you to pick out your strengths and weaknesses :)

Chris

Report Sun 20th March, 2011 @ 18:38

Cheers glad I can help :) I will probably make a Unit 2 one soon

Report Thu 24th March, 2011 @ 09:36

That would be really helpful :)

Jan Hayes

Report Sun 29th April, 2012 @ 18:43

Really useful thanks

Victoria

Report Wed 16th May, 2012 @ 00:01

Really helpful, there aren't many geology resources out there, but this made a nice change

Sarah Curtis

Report Tue 15th January, 2013 @ 11:01

that was quite hard

Genny Michaels

Report Mon 18th February, 2013 @ 00:30

very useful way of revising, thank you

Get Revising

Geology AS Revision Unit 1

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