Geology -- lecture

[equalsmcsquared.livejournal.com]

Good morning. I'm pleased to see that you've survived the zombie infestation. Coffee and energy bars are at the back and if you need any first aid treatment, please speak up. Otherwise, don't forget to sign the roll sheet before you leave. There will be a lab on Wednesday.

Today, we will be discussing the processes of weathering.

Simply put, weathering is the breakdown and alteration of rocks and minerals at or near the Earth's surface into products that are more in equilibrium with the conditions found in this environment. Most rocks and minerals are formed deep within the Earth's crust where temperatures and pressures differ greatly from the surface. Because the physical and chemical nature of materials formed in the Earth's interior are characteristically in disequilibrium with conditions occurring on the surface. Because of this disequilbrium, these materials are easily attacked, decomposed, and eroded by various chemical and physical surface processes.

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[studentwillow.livejournal.com]

Willow walks in late, looking confused. She's still not sure what day it is or if she's missing any homework assignments in this class. Takes a seat and wonders who her lab partner is too. Breathes a sigh of relief that she's got her Geology textbook and notebook with her.