Class Notes (839,091)
Canada (511,184)
EESA06H3 (570)
Lisa Tutty (12)
Lecture 8

EESA06 Lecture 8 Notes.docx

3 Pages
113 Views

Department
Environmental Science
Course Code
EESA06H3
Professor
Lisa Tutty

This preview shows page 1. Sign up to view the full 3 pages of the document.
Description
Mar 4, 2013 EESA06 Lecture 8 Notes  Layer cake diagram has the 4 layers of Ontario geology  Most rocks in layer 1 are metamorphic; made when old plates came together and formed old mountains that no longer exist  Gneiss rock on the way to Sudbury is the roots of old chain of mountains that have been worn away by erosion  May collisions happened to form the craton/core of North America  Layer 2 was the mountainous surface and was located near the equator  Over time the erosion wore down layer 2 until it was relatively flat; peneplanation (rugged surface that was worn down to being almost flat)  Coral reef started to form and created limestone on layer 2; has lots of sedimentary rocks  Bits of rock that are eroding off of the mountains are deposited into the shallow seas with the coral reef and smothers them; forms clastic sedimentary rocks such as sandstone and shale  Layers of repetitive rocks- inter-bedding (repeated cycles of rock types)  Paleozoic is 400-600 mya  Black line between layers 1 and 2 is the great unconformity  Black line between layers 2 and 3 is the unconformity called the ‘big gap’  Layer 3 is not rocks but glacial and interglacial sediments  20 000 Toronto was covered by a km thick of ice  Interglacial means between times of ice cover  Layer 4 is all the garbage and building; everything humans are doing to the landscape  Each layer has different resources  People started making geologic maps when they became interested in resources  Egyptian map was used to find way to gold resource  Before Agricola, people thought rocks and minerals had magic properties  Agricola noticed that slaves working in mines got diseases that other people didn’t get, and noticed things about geology so he wrote a book about geology and diseases  William ‘Strata’ Smith; came up with the stratographic principal of fossils to figure out what layers are older than others; made the first modern geological map  Sir William Logan made maps for the search for coal  Slave Craton and Superior Craton are the old areas that are part of layer 1 and are marked as greenstone; they have a specific set of index minerals which make the rock look green  Greenstone is extraordinarily rich in economic resources such as gold  *short answer question* VMS: you get sea water and near MOR, the sea water gets into the cracks and gets heated up; as sea water gets heated and goes through the rocks, it ends up exchanging O, K, Ca, Mg between water and the Mar 4, 2013 rock; when water gets very hot, it picks up Iron, Sulfur, Zinc and Copper, and water makes it way out of rocks and comes out into the cold sea again; cools down and can no longer hold onto S, Co, Fe, Zn; leaves pure minerals with almost no refining  Acid mine drainage- runoff came down the hill into the
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit