SNOW BALL THEORY
glacier spread across
glacial deposits gong back
radiation from🌞
absorbed
reflect
SURFACE ALBEDO :radiation 返回的量
ocean water :al ↓ 热效
ice &snow al ↑ e.g.
白衣凉，黑衣热
cooling
ice cover↑
SA↑ climate↓
ice 多
ICE ALBEDO FEEDBACK
一般被 制止
但根据Snow ball earth 继续了
导致冰一直增加，cover至ocean
chemical index of alteration：环境造成的chemical changes in rock
↑ :warm/humid
↓cool/dry
结论:不持续