Who’s Fault is it? By: Mai Vo, Gabby Amini, and Jessie Bacon

Definition of Fault Fault: a fracture in Earth’s lithosphere along which blocks of rock move past each other

The Fault Under Horizon Named: Horizon Fault Located completely beneath Horizon School Because Horizon is on the fault the earthquake would cause thousands of dollars in repairs The fault would make Horizon crack in half and collapes It is a strike-slip fault ( you will learn what this fault is in a moment)

Strike- slip Fault Example: San Andrea’s Fault Definition: a strike-slip fault is a fault in which the surface on opposites of the fault plane have moved horizontally and parallel to the strike of fault A strike- slip fault is a transformation fault Described to move “side by side” 2 types of strike- slip faults are: left-lateral (meaning that it moves horizontally to the left) right- lateral (moves horizontal to the right) Haiti’s earthquake was caused by a left- lateral fault

Normal Fault Example: Great Rift Valley of Africa Definition: It is a fault in which the hanging wall has moved downward Because the hanging wall moves downward, younger rocks are placed over the older rock Over time they can form mountains and valleys Earthquakes along faults are common near boundaries where tectonic plates are moving apart They typically fall at 40 and 70 degree angles, low angled ones fall at 10 degrees or less and have very interesting problem for structural geologists Structural geologists : study of the three- dimensional falling of rock units

Reverse Fault Example: The Himalaya Mountains rise in an area where the Eurasia Plate is being pushed by the Indian Plate; it brings a lot of earthquakes Definition: Along the reverse fault a block of rock that the fault plane moves up which is relative to another block They can occur near collision zone boundaries between plates The movement of rocks along normal and reverse faults push up mountains which forms deep valleys

Who did what? Mai- Strike- slip fault slide Gabby- Normal fault slide Jessie- Reverse fault slide All- Power point, props We all worked at Mai’s house

Resources Normal Faults, Geology of the National Parks, February 4th, 2010, Michael Ritter, Types of Faults, The Physical Environment, February 4, Unknown Author, Fault Geology, Wikipedia The Free Encyclopedia, February 7, Paul Preuss, Living on the Fault line, Energy and Earth Sciences, February 8, Multiple Authors, The Changing Earth, McDougal Littell, Washington D.C., 2007 Unknown Author, Normal Fault & Reverse Fault, Structural Geology, February 7, 2010, Mai’s house, supplies and parents