Paleoseismology Intro

Paleoseismology: The study of prehistoric
earthquakes

1st
Earthquake
horizon:
earthquake
happened
after youngest
cut layer and
before the first
unbroken
layer above it.

2nd
Earthquake
horizon:
earthquake
happened
after youngest
cut layer and
before the first
unbroken
layer above it.

1800

1900

1200

Charcoal in layers can be
radiometrically dated to
constrain earthquake
occurrence date.

https://d9-wret.s3.us-west-2.
amazonaws.com/assets/pall
adium/production/s3fs-public
/thumbnails/image/xsect-cart
oon.gif

1400

1600

1300

Paleoseismology practice

https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/thumbnails/image/trenchwall.jpg

Paleoseismology practice

https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/thumbnails/image/trenchwall.jpg

Paleoseismology practice

https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/thumbnails/image/trenchwall.jpg

Paleoseismology practice

https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/thumbnails/image/trenchwall.jpg

What calendar year did
this earthquake likely
occur?