EESA06H3 Lecture 1: Plate Tectonics
Document Summary
Lecture 1: earth is 4. 5 billion years old; 3. 5 billion is the age of first continents, geology is the study of earth. Highway 400 the rocks are 4 billion years old. Ex. discovering of dna was a paradigm in science: the(cid:396)e is (cid:374)o(cid:449)he(cid:396)e that"s sta(cid:271)le o(cid:374) ea(cid:396)th"s su(cid:396)fa(cid:272)e. i(cid:374) (cid:374)o(cid:396)th a(cid:373)e(cid:396)i(cid:272)a (cid:449)e a(cid:396)e (cid:373)o(cid:448)i(cid:374)g (cid:1007). 7 cm towards the southwest. Sea floor spreading: the progressive widening of the ocean. Pangea: (cid:373)ea(cid:374)s (cid:862)all the la(cid:374)d(cid:863) (cid:1006)(cid:1006)5 (cid:373)illio(cid:374) yea(cid:396)s ago. Supercontinent cycles: slowly over the next 250 million years bring all the continents back together again. Supercontinents have very unstable features, so they break up and the whole cycle start again. Outcrops: where you actually can see rocks in the field. Vector: shows the direction of movement of an object. When you put these great ice sheets on the north american continent, the continent bends down underneath.
