Table of Contents
- 1 What type of fault rocks slide past each other in opposite direction?
- 2 What happens when plates bump up against one another?
- 3 What is it called when rocks slide past each other?
- 4 What will happen to a rock if two plates converge?
- 5 What do we call the continuously moving part of the earth’s crust fault?
- 6 How are faults related to dislocation of strata?
- 7 What happens to a rock during brittle deformation?
What type of fault rocks slide past each other in opposite direction?
When oceanic or continental plates slide past each other in opposite directions, or move in the same direction but at different speeds, a transform fault boundary is formed. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault.
What happens when plates bump up against one another?
When two plates with continental crust collide, they will crumple and fold the rock between them. A plate with older, denser oceanic crust will sink beneath another plate. The crust melts in the asthenosphere and is destroyed.
What happens when the trees on the edge of the tectonic plates overcomes the friction that holds the plates together?
When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth’s crust and cause the shaking that we feel. In California there are two plates – the Pacific Plate and the North American Plate.
Is the idea that the earth’s crust and upper mantle are broken into sections that move around on the mantle?
Plate tectonics states that the Earth’s crust and upper mantle are broken into sections, called plates. These plates move around the mantle.
What is it called when rocks slide past each other?
Strike-slip faults indicate rocks are sliding past each other horizontally, with little to no vertical movement. Both the San Andreas and Anatolian Faults are strike-slip. Reverse faults, also called thrust faults, slide one block of crust on top of another.
What will happen to a rock if two plates converge?
If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary.
In what direction do the two plates move?
The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other. They move at a rate of one to two inches (three to five centimeters) per year.
Is a place where the crust of the lithosphere has fractured?
A fault is a place where the crust of the lithosphere has fractured.
What do we call the continuously moving part of the earth’s crust fault?
tectonic plates
The Earth’s crust and upper part of the mantle are broken into large pieces called tectonic plates. These are constantly moving at a few centimetres each year.
Figure 10.22: A fault is a plane of dislocation where rocks on one side of the fault have moved relative to rocks on the other side. Strata on one side of the fault plane are typically offset from strata on the opposite side. 2. Figure 10.6: Faults can form in response to any one of the three types of forces: compression]
How are folds and faulting related to rock deformation?
The type of deformation experienced by a rock body depends largely on the type of force exerted. (a) Fig. 10.6a: Compressive forces generate folding and faulting as a consequence of shortening. Compressive forces are common along convergent plate boundaries resulting in mountain ranges.
How are rocks under high confining pressures deformed?
This is known as ductile deformation and the rock is said to behave plastically. 5. Rocks under low confining pressures near the earth’s surface therefore generally deform through fracturing and faulting. Rocks deep within the crust under high confining pressures deform by folding.
What happens to a rock during brittle deformation?
Rocks that undergo brittle deformation tend to fracture into joints and faults. 1. Figure 10.20: A joint is a crack in a rock along which no appreciable movement has occurred. Strata on one side of the joint align with strata on the other side.