Evidence about Past Earthquakes From Faults

By: Thomas Solowynsky, Tom Mulally, Victoria Flis, Omar Oregel

Faults There are many faults that tell us

different effects and are caused by earthquakes.

Faults form because of extension or compression.

In Moab, faults are not active right now.

We will explain about earthquakes and what is different between small faults and huge faults.

Extension makes normal faults Stretching of

the ground is called Extension

Extension causes normal faults to form

Identify Faults Some layers and faults are

exposed so clearly like show different kind of stones and slips. Its can tell us if its compression or extension. Or some layers and faults are in a mess and many slips. Sometime its hard to identify the stone because it was mixed up and deformation.

Earthquake Earthquakes tend to start from the

movement in aethenosphere and it will hit to lithosphere.

In the western of U.S., earthquakes can go up to magnitude 6.0 or 7.0.

Small Faults Small faults were caused by either

many small or one medium earthquakes.

In Moab and Arches National Park, small faults tend to clearly show slips and layers.

It is easy to identify kind of rocks and match the layers.

Examples of small faults

Small Faults

Slip on small faults

Slip on faults

Huge Faults Earthquakes cause the rocks to

move by slip on the fault. Near the fault, the rock gets broken

into lots of pieces from power of earthquakes.

Lots of power = lots of broken rocks There is a lot of grinding close to

faults.

Huge Faults

Very Broken Rocks! Not Very Broken Rocks

More About Huge Faults Water goes through faults easily

because of cracks and broken rocks. When old age rocks are together

with younger age rocks, we must have a big fault.

Over time rain falls onto the mountain and the mountain is made more smooth shaped. This is erosion.

Huge Fault Features

Different color

FaultYoungestRocks

YoungRocks

OldestRocks

Conclusions Evidence in the field tells us that old

faults once produced earthquakes Small earthquakes

Simple cracks with small amount of slip

Large earthquakes Lots of broken rocks Large faults are easy places for water to

Thanks for Thanks for watching our watching our

presentationpresentation

Evidence about Past Earthquakes From Faults

Documents

Earthquakes CHAPTER the BIG idea CHAPTER OUTLINE Earthquakes release stress that has built up in rocks. Earthquakes occur along faults. 2.1 Earthquakes

#6 Faults, Earthquakes, & Seismology

SEISMIC HAZARD, FAULTS AND EARTHQUAKES DIGBY NECK, …

Chapter 9: Earthquakes 9.1: Earthquakes occur along faults 9.2: Earthquakes release energy 9.3: Earthquake damage can be reduced

Seismology - SOEST · 2 Earthquakes earthquake: movement of rock bodies past other fault: locus of the earthquake movement faults come at all scales, mm to separation of

Faults & Earthquakes Deforming the Earth’s Crust

Faults, Earthquakes & Volcanoes

Earthquakes, quaternary faults, and seismic hazard in California€¦ · Earthquakes, Quaternary Faults, and Seismic Hazard in California STEVEN G. WESNOUSKY 1 Seismological Laboratory,

Stresses, Faults, Folds, and Earthquakes

Faults & Earthquakes

EARTHQUAKES & VOLCANOES. EARTHQUAKES Vibrations in the ground that result from movement along breaks in Earth’s lithosphere called faults

Earthquakes and Faults Module(1)

Earthquake safety 2-4. Earthquake risk Determined by locating where faults are active and where past earthquakes have occurred High risk on West coast

Earthquakes HOW AND WHERE EARTHQUAKES HAPPEN. Why Earthquakes Happen? Rocks along faults pressed tightly together. Rocks along faults pressed tightly

Earthquakes, Quaternary Faults, and Seismic Hazard in California · Earthquakes, Quaternary Faults, and Seismic Hazard in California STEVEN G. WESNOUSKY 1 Seismological Laboratory,

Evidence about Past Earthquakes From Faults By: Thomas Solowynsky, Tom Mulally, Victoria Flis, Omar Oregel

Modeling Earthquakes Faults and Statistics

Connecting earthquakes and faults

Earthquakes Marc Daniels Earth Science. Lesson 1: Where Do Earthquakes Occur and Types of Earthquakes/Faults This will go over where earthquakes potentially

Lab 8: Geologic Hazards: Earthquakes and Landslidespita.ess.washington.edu/tswanson/wp-content/... · Earthquakes and Landslides Introduction ... (Figure 8-2); these faults often