OC6239

Canada"s geologic journey- the last 4 billion years. Outline of lecture: (read chapter 20) continents grow through time by obduction.
north american

seismic reflection-return of some of the energy of seismic waves to the earth"s surface after the waves bounce off a rock boundary.
waves reflect o

alpine-himalayan orogeny: the building of the next super continent (pangea 2)
earth"s history tells us of the future.
all the continents are head

guyots: (named after an oceanographer) a flat topped dead volcano hot spots are usually associated with hot spot islands in the middle of oceans. 60"

stratigraphy is arranging rocks in some sort of logical sequence in terms of their age.
ancient greeks recognized fossils embedded in rocks now on