GEO307 Ch 3 Notes - GEO307 Chapter 3 I. Interior of Earth...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
GEO307 Chapter 3 I. Interior of Earth (what we know) a. Shape, size, mass; can calculate density, internal pressures/temps (heavier matter inside) b. Magnetic field (creating material inside Earth) c. Meteorites (from ancient planet pieces) d. Arrival times of seismic waves generated by earthquakes II. Basic Earth structure a. Continental crust 30-40 km thick b. Oceanic crust 6-7 km thick c. Upper mantle behaves rigidly d. Less rigid asthenosphere (partially molten below lithosphere ^) e. Below 200 km, mantle is solid III. Seismic waves (generated by earthquake) a. P-wave – primary wave (fastest, compressional), moves horizontally b. S-wave – secondary wave/shear wave (slower), moves up/down, can’t propagate in liquids c. Surface wave – late d. Speed of propagation depends on properties e. Geologists compare arrival times of seismic waves & map out internal geometry of Earth f. Shadow zones – occur because density/state differences of Earth’s interior IV. Internal layers a. Inner core – solid, heavy, hot b. Outer core – liquid c. Mantle – solid/mobile – 70% of Earth’s volume
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
d.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/16/2008 for the course GEO 307 taught by Professor Gardner during the Spring '08 term at University of Texas at Austin.

Page1 / 4

GEO307 Ch 3 Notes - GEO307 Chapter 3 I. Interior of Earth...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online