ERTH 2403 Lecture 2: Origin of the Ocean

• School: Carleton University
• Department: Earth Sciences
• Course: ERTH 2403
• Professor: Hafida El Bilali

Document Summary

Origin of the ocean: oceanography is the story of the ocean conditions necessary for a large permanent ocean to exist are, ea(cid:396)th(cid:859)s size a(cid:374)d its g(cid:396)a(cid:448)it(cid:455) Large enough and enough gravity to create water on surface, preventing from drifting into space: ea(cid:396)th(cid:859)s (cid:272)al(cid:373) a(cid:374)d sta(cid:271)le su(cid:396)(cid:396)ou(cid:374)di(cid:374)g, ea(cid:396)th(cid:859)s dista(cid:374)(cid:272)e f(cid:396)o(cid:373) the u(cid:374) Just right for an ocean to stay and remain in liquid state: stephen hawking big bang video, whole universe expanding in all directions, getting bigger and bigger. Jupiter, saturn, uranus, neptune (cid:858)lefto(cid:448)e(cid:396)s(cid:859) f(cid:396)o(cid:373) the fo(cid:396)(cid:373)atio(cid:374) p(cid:396)o(cid:272)ess (cid:271)e(cid:272)o(cid:373)e aste(cid:396)oids (cid:894)(cid:373)etal/(cid:396)o(cid:272)k(cid:895) a(cid:374)d comets (mostly ice: 2. Earth: earth formed 4. 6 billion years ago, young earth was formed by accretion, you(cid:374)g ea(cid:396)th(cid:859)s su(cid:396)fa(cid:272)e (cid:449)as heated from the continued accretion/collisions. Iron and nickel pulled by gravity form the core of the earth. Lighter minerals, silicon, magnesium, aluminum, and oxygen compounds go to the su(cid:396)fa(cid:272)e fo(cid:396)(cid:373)i(cid:374)g ea(cid:396)th(cid:859)s (cid:272)(cid:396)ust: density stratification process results in layers sorted by density.