'Slab pull' diaporamas de présentation

1.65k views • 92 slides

Earth ~200 million years ago

Earth ~200 million years ago. The Geologic Time Scale. Based on. *Fossils *Correlation. Later. *Calibrated with radiometric dating. The Continental Drift Hypothesis. Proposed by Alfred Wegener in 1915. Supercontinent Pangaea started to break up about 200 million years ago.

667 views • 37 slides

Plate Tectonics

834 views • 34 slides

Plate Tectonics

451 views • 29 slides

Drifting Continents

Drifting Continents. Continental Drift Earth was once a super continent called Pangaea (over 200 mya) Proposed by Alfred Wegener. Evidence. 1. Rock Formation Africa & South America 2. Fossils Glossopteris found in cold climates 3. Ancient Climates Coal deposits in Antarctica.

398 views • 24 slides

Plate Tectonics

316 views • 21 slides

Cratonic keels and a 2-layer mantle tested:

Cratonic keels and a 2-layer mantle tested:. Mantle expulsion during Arabia-Russia closure linked to westward enlargement of the Black Sea, formation of the Western Alps and subduction of the Tyrrhenian (not the Ionian) Sea. Miles Osmaston.

298 views • 20 slides

Causes of Plate Motion

Causes of Plate Motion. Objectives. Explain the process of convection. Summarize how convection in the mantle is related to the movements of tectonic plates. Compare and contrast the processes of ridge push and slab pull. Vocabulary. Mantle Convection Current ridge push slab pull.

442 views • 14 slides

Warm up pg. 86

Warm up pg. 86. What are the three different ways tectonic plates can interact with one another? Is ocean floor closer to a ridge younger or older than floor further away? Why? What two devices helped scientists map the ocean floor?

149 views • 8 slides

246 views • 6 slides