University:
Amherst College
Course:
GEOL 291 | Structural Geology
Academic year:

2020
Views:

132

Pages:

17
Author:

Dale French

Absolute plate motions Absolute plate motions Middle Triassic (older than magnetic “stripes”) Pangea Early Jurassic Pangea begins to break up Laurentia-Gondwanaland split Early Cretaceous (Anomaly M20 time) note: M anomalies are older than anomaly 34 Gondwanaland starts to split South Atlantic rifting Middle Cretaceous (34 -Cretaceous normal time) Rift forms between Greenland and North America Late Cretaceous (Anomaly 29 time) Greenland on European plate Eocene (Anomaly 21 time) Greenland on it own plate Oligocene (Anomaly 13 time) Greenland on North American plate Miocene (Anomaly 6 time) Greenland on North American plate Pangea What happened during breakup? Why did it break up? Rifting: formation of a new MOR Continental rifting: stretching of old continental lithosphere Drifting: formation of new oceanic lithosphere

Rifting Part 2

Related Documents

Description

Related Documents

Free up your schedule!

Take 5 seconds to unlock