What is the best definition of fault?
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What is the best definition of fault?
A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. Earth scientists use the angle of the fault with respect to the surface (known as the dip) and the direction of slip along the fault to classify faults.
What is the opposite word of fault?
fault(n) Antonyms: merit, perfection, beauty, impeccability. Synonyms: defect, imperfection, failing, foible, shortcoming, blemish, flaw, demerit, dereliction, offense, indiscretion, lapse, delinquency.
What is the opposite word of fold?
Antonyms: open, spread, unfold, spread out. Synonyms: turn, sheep pen, curve, flexure, plication, bending, sheepcote, faithful, flexion, bend, bend dexter, crease, crimp, wrinkle, seam, twist, flection, creese, plica, sheepfold, pleating, line, furrow, folding, crinkle, crook, congregation, crimper, flock, kris.
What are the 3 types of fault?
Different types of faults include: normal (extensional) faults; reverse or thrust (compressional) faults; and strike-slip (shearing) faults.
What causes a normal fault?
Tensional stress, meaning rocks pulling apart from each other, creates a normal fault. With normal faults, the hanging wall and footwall are pulled apart from each other, and the hanging wall drops down relative to the footwall. Compressional stress, meaning rocks pushing into each other, creates a reverse fault.
What happens reverse fault?
Reverse faults are exactly the opposite of normal faults. If the hanging wall rises relative to the footwall, you have a reverse fault. Reverse faults occur in areas undergoing compression (squishing). The footwall is on the left.
Which is the best description of thrust fault?
A thrust fault is a break in the Earth’s crust, across which older rocks are pushed above younger rocks.
What are 3 things that cause earthquakes?
Things that cause earthquakes
- Groundwater extraction – decrease in pore pressure.
- Groundwater – increase in pore pressure.
- Heavy rain.
- Pore fluid flow.
- High CO2 pressure.
- Building dams.
- Earthquakes.
- No earthquakes (Seismic quiescence)
What happens before an earthquake begins?
Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. They don’t just slide smoothly; the rocks catch on each other.
Are small earthquakes good or bad?
The takeaway here is probably already clear; Burgmann says small quakes are a good signal to get prepared — that whenever we have one, it boosts the probability of another occurring within a week by about 10 percent.
Do most earthquakes happen at night?
Earthquakes are equally as likely to occur in the morning or the evening. Many studies in the past have shown no significant correlations between the rate of earthquake occurrence and the semi-diurnal tides when using large earthquake catalogs.
