Geologic Structures

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Last updated 4:39 AM on 4/21/26
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17 Terms

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<p>Strike</p>

Strike

direction of a rock layer

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<p>Dip</p>

Dip

angle a rock layer tilts

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Anticline

upward fold with oldest rock in center

<p>upward fold with oldest rock in center</p>
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Syncline

downward fold with youngest rock in center

<p>downward fold with youngest rock in center</p>
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Monocline

step-like bend in rock layers

<p>step-like bend in rock layers</p>
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Overturned fold

fold tilted so layers are flipped

<p>fold tilted so layers are flipped</p>
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Plunging fold

fold tilted into the ground

<p>fold tilted into the ground</p>
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Dome

circular structure with oldest rocks in center

<p>circular structure with oldest rocks in center</p>
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Basin

circular structure with youngest rocks in center

<p>circular structure with youngest rocks in center</p>
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Fault

break in rock where movement occurs

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Normal fault

hanging wall moves down

<p>hanging wall moves down</p>
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Reverse fault

hanging wall moves up

<p>hanging wall moves up</p>
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Thrust fault

low-angle reverse fault

<p>low-angle reverse fault</p>
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Strike-slip fault

horizontal movement along fault

<p>horizontal movement along fault</p>
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Contact

boundary between rock layers

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Cross-section

vertical slice of Earth

<p>vertical slice of Earth</p>
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Block diagram

3D representation of geology

<p>3D representation of geology</p>