WorksheetsGeology Quiz: Strike, Dip, and Rock Layers
Total questions: 25
Worksheet time: 13mins
What does 'strike' refer to in geology?
The angle of rock layers
Direction of a horizontal line on a sloping surface
The type of rock present
The age of rock layers
What is 'dip' in geological terms?
The direction of erosion
Angle between inclined rock surface and the horizontal
The type of sedimentary rock
The depth of rock layers
How is true dip measured?
Using a protractor
By visual observation
Using a clinometer
Using a compass
What is an example of a location with horizontal strata?
Sahara Desert
Mount Everest
Grand Canyon
Great Barrier Reef
What causes dipping strata?
Sedimentary deposition
Tectonic deformation
Volcanic activity
Weathering
What is an outlier in geology?
A type of unconformity
A valley of sedimentary rock
An island of younger rock surrounded by older rocks
A layer of older rock
What does the Law of Superposition state?
Oldest layers are below younger ones
Younger layers are above older layers
Layers are deposited horizontally
Features cutting across rocks are older
What is an angular unconformity?
Erosion of parallel layers
Tilted older rocks eroded and covered by new layers
A gap in the geological record
Sedimentary layers overlying igneous rocks
What does the Law of Original Horizontality imply?
Rocks are always deposited vertically
Rocks cannot be folded
Sedimentary rocks are deposited horizontally
All rocks are the same age
What is a disconformity?
Erosion of tilted layers
Parallel sedimentary layers separated by an erosional surface
A type of igneous intrusion
A layer of metamorphic rock
What is the first step in the formation of an unconformity?
Deposition
Erosion
Warping
Uplift
What does subsidence refer to?
The uplift of rock layers
The deposition of new layers
The erosion of sediment
The sinking of the Earth's surface
What is the maximum angle of true dip mentioned in the text?
30°
45°
25°
15°
What is the purpose of a clinometer?
To determine the type of rock
To measure the angle of dip
To measure the age of rocks
To assess erosion levels
What is an inlier?
Older rocks surrounded by younger rocks
A geological feature formed by erosion
Younger rocks surrounded by older rocks
A type of unconformity
What geological feature is formed by uplift?
Valleys
Mountains
Plains
Lakes
What does the term 'erosion' refer to?
The removal of rock or soil
The deposition of sediments
The folding of rock layers
The formation of new rocks
What is the significance of dip direction and angle?
They indicate the age of rocks
They reveal geological history and tectonic forces
They determine the type of rock
They measure erosion rates
What type of unconformity involves no angular difference?
Subconformity
Nonconformity
Disconformity
Angular unconformity
What is the result of orogeny?
Deposition of igneous rocks
Erosion of sedimentary layers
Mountain formation and earthquakes
Formation of valleys
What is the relationship between faults and the Law of Cross-Cutting Relationships?
Faults have no relation to rock layers
Faults are younger than the rocks they cut across
Faults are always horizontal
Faults are older than the rocks they cut across
What is the primary characteristic of horizontal strata?
They are always eroded
They are found only in valleys
They are formed as flat layers
They are always tilted
What geological feature is capped with hard sedimentary or igneous rocks?
Valleys
Mountains
Plains
Mesas
What is the angle range for dipping strata?
0° to 45°
0° to 90°
0° to 60°
0° to 30°
What is the main cause of erosion?
Wind
Water
Gravity
All of the above
