Class Notes (905,836)
CA (538,520)
KPU (52)
GEOG (11)
GEOG 1120 (11)
Lecture 9

GEOG 1120 Lecture 9: Weathering and SED Rocks

5 Pages

Course Code
GEOG 1120
John Martin

This preview shows pages 1 and half of page 2. Sign up to view the full 5 pages of the document.

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
find more resources at Lecture 9: Weathering and SED Rocks I. Intro - Contain fossils. - Important economics: Soil, oil. - Rock cycle: A. Sedimentary rocks B. Metamorphic rocks C. Igneous rocks D. Sediments - Hardness: Hard rocks will weather slowly, soft minerals will weather quickly due to solubility and oxidation potential (Felsic oxides very fast). - Silicates can be summarized using Bowen's DSI (Olivine weather very quickly, Quartz the strongest). II. Mechanic Weathering - Physical breakdown of rocks. 1. Frost Wedging - requires water and temperature of zero (once there is a crack in the rock, water gets in and freezes). 2. Root Wedging 3. Unloading/Exfoliation - rock forms deep in Earth and in under pressure and when it expands, it results a fracture. - Do not move the rocks, they breakdown on their own. find more resources at find more resources at - When they physically weather, they rare angular shape. - The process of rock breakdown cannot be stopped. III. Chemical Weathering - Chemical breakdown of rocks. 1. Dissolution - some minerals are soluble and dissolve in water. => Ex: Halite dissolves quickly but rocks do dissolve in water slowly. => Halite is the most susceptible to dissolution. 2. Oxidation - most commonly Fe(2+) with O and H2O to form Fe(3+). => The Oxides are the most susceptible to oxidation. 3. Hydrolysis - results in the production of ions, give it's dull appearance. - Mafic rocks cannot be stopped from rusting. - Rates of Weathering: => Three main factors: A. Mineralogy B. Climate C. Process find more resources at find more resources at IV. Erosion - Weathering => doesn't move; Erosion => moving the pieces once they break down, transport of weathered materials. - Erosion Agents: 1. Rivers => Size: small to medium => Can only carry small rocks => Sorting: sorted (good at sorting) => Shape: rounded 2. Glaciers => Size: large => Not sorted, they just move them around => Shape: angular 3. Wind => Size: tiny => Not very sorted => Shape: round 4. Landslides => Size
More Less
Unlock Document

Only pages 1 and half of page 2 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


Don't have an account?

Join OneClass

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

Sign up

Join to view


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.