New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Geology 305 Notes for October 17

by: Brandon Cook

Geology 305 Notes for October 17 Geology 305

Marketplace > University of South Carolina - Columbia > Geology > Geology 305 > Geology 305 Notes for October 17
Brandon Cook


Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

The notes covers the Faint Young Sun Paradox
Earth Systems Through Time
Dr. Susan Lang
Class Notes
25 ?




Popular in Earth Systems Through Time

Popular in Geology

This 2 page Class Notes was uploaded by Brandon Cook on Tuesday October 18, 2016. The Class Notes belongs to Geology 305 at University of South Carolina - Columbia taught by Dr. Susan Lang in Fall 2016. Since its upload, it has received 6 views. For similar materials see Earth Systems Through Time in Geology at University of South Carolina - Columbia.


Reviews for Geology 305 Notes for October 17


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 10/18/16
Back From Fall Break Faint Young Sun What is paradoxical about F Y S ? What evidence is there for liquid water on Early Earth? What could explain the faint young sun paradox? Stars including sun becomes brighter over its life Young Stars are fainter than older stars In Archean sun was ¼ less bright about 233 K now at 256 K With the same amount of GHG the earth would be frozen before 2 bya Pillow Basalts require liquid water to form common in Archean greenstone belt 3.8 bya other evidence is sedimentary structures occurred too Delta O18 zircons indicate the presence of liquid water as early as 4.4 bya Many Archean rocks are sediments of deep water origin, cherts halites and gypsum Pillow basalts and O18 zircons Also no evidence of glaciation until 2.3 bya Earth temperature between 0-100C for the first 2.2 bya To warm planet enough to prevent frozen water would require 100-1000x more CO2. High CO2 results in siderite in the soils Absence of siderite in Archean paleosoils to account for it Record from Archean indicate raindrops are large indicates air density was similar to present day Suggest very high CO2 level unlikely Evidence paleobarometers suggests CO2 unlikely to be that high Methane is 8x stronger GHG Early Earth was oxygen free CH4 resulted in a brown hazy sky Could have provided sufficient global warming without high CO2 levels Methane can only happen in the absence of oxygen Microbes formed methane (methanogenesis) Oxygen is present- form water Present day 0.7 ppmv High methane levels lead to an organic haze which reflects sunlight Very high CH4 levels unlikely Magnetite in Archaean chemical sediments CO2 and H2 mixing ratios nots significantly different than present Why? Early earth may had much lower albedo than today Water has a lower albedo than land surface Fewer clouds with fewer Cloud condensation nuclei CCN Presently CCN formed due to plants and algae Early earth was combination of higher GHG and lower albedo than present day Earth


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Janice Dongeun University of Washington

"I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.