Geo Lab Presentation 1

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GEOS 100 Final Presentation Columbia River Basalts :

GEOS 100 Final Presentation Columbia River Basalts Olivia Tocher MJ Faris Jaelyn Aquino 1

Rock Types:

Rock Types Igneous Rock - Lava Flows Basalt River Sediments More than 300 Lava Flows!!! 2

Slide3:

3

Major Structural Features:

Major Structural Features 4

Slide5:

5

Slide6:

6

A Rich (And Volcanic!) Geologic History:

A Rich (And Volcanic!) Geologic History 17.4 - 17 Ma Picture Gorge Basalt (Not much left over today, no handy image) 16.5 - 15.6 Ma Imnaha Basalt Grande Ronde Basalt 16 - 15 Ma Wanapum Basalt 15.6 - 14.5 Ma Saddle Mountains Basalt Approx. 10 Ma 7

Slide8:

8

The Dangers of Building a City on a Landslide Deposit:

The Dangers of Building a City on a Landslide Deposit Lewiston, ID 9 ?

Basalt flows + deposited sediment =:

Basalt flows + deposited sediment = Lewiston, ID May 1998 10

Thank you for watching!:

Thank you for watching! 11

Works Cited:

Works Cited Digital Geology of Idaho http://geology.isu.edu/Digital_Geology_Idaho/Module10/mod10.htm Columbia River Flood Basalts http://volcano.oregonstate.edu/book/export/html/486 Idaho Geological Survey http://www.idahogeology.org/DrawOnePage.asp?PageID=83 https://www.researchgate.net/publication/280296629_An_introduction_to_the_stratigraphy_structural_geology_and_hydrogeology_of_the_Columbia_River_Flood-Basalt_Province_A_primer_for_the_GSA_Columbia_River_Basalt_Group_field_trips 12