1 / 12

I. Our Dynamic Earth Expressed through the Creation of the Philippine Archipelago

Garrett Apuzen-Ito Professor of Geophysics Department of Geology & Geophysics SOEST, University of Hawaii-Manoa. Objectives: 1) Overview plate tectonics & Earth’s major forms of volcanism 2) Summarize origin & evolution of the Philippine Archipelago.

kalkin
Download Presentation

I. Our Dynamic Earth Expressed through the Creation of the Philippine Archipelago

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Garrett Apuzen-ItoProfessor of Geophysics Department of Geology & Geophysics SOEST, University of Hawaii-Manoa Objectives: 1) Overview plate tectonics & Earth’s major forms of volcanism 2) Summarize origin & evolution of the Philippine Archipelago • I. Our Dynamic Earth Expressed through the Creation of the Philippine Archipelago

  2. Plate Tectonics The rigid outer shell of the Earth, called the lithosphere, is broken up into many rigid segments of different sizes and shapes.

  3. Plate Tectonics First evident in the continent jigsaw puzzle Pangaea (240 Myr ago) Present Day

  4. Types of Plate Boundaries Convergent Divergent Transform

  5. Plate Tectonics is the Surface Expression of Mantle Convection Upper mantle Hot (~3000 oF), Ductile but (mostly) solid seafloor spreading subduction subduction

  6. How Fast Do the Plates Move? seafloor spreading Sloooowly: 1-10 cm/yr subduction subduction

  7. How Long Did it Take to Create the Pacific Basin? seafloor spreading That’s about 100 Million yrs! 1-10 cm/yr A 1000 human life times gives 10km At 10 cm/yr & life time of 100 yrs how much finger nail is grown? A 1000 x 1000 human life times gives 10,000km subduction subduction 10 m

  8. Three Main Origins of Volcanism Mid-ocean ridge volcanism creates the seafloor. 60% of Earth’s surface!

  9. Three Main Origins of Volcanism

  10. Three Main Origins of Volcanism Arc volcanism behind subduction zones. “Pacific Ring of Fire”

  11. Tectonic Environment of the Philippines

  12. How to Prepare for your Talk 1) Collect and learn your material 2) Decide on your main points 3)Prepare slides that start lead your forward towards your main points 4) Practice (for effect, timing, performance) 5) Adjust your slides appropriately 6) Practice out loud to yourself

More Related