Terrestrial Planets 1. Earth as a planet: interior & tectonics. 2. Dynamics of the mantle 3. Modeling terrestrial planets
The Formation of the Earth • Precise timeline of early events using U/Pb and Hf/W isotope chronometers. Jacobsen (2003)
The Formation of the Earth • Asteroid Itokawa might resemble the clumps that agglomerated to form the Earth & planets
The Formation of the Moon Canup & Asphaug (2001)
Earth as a planet - interior
Earth interior - seismic waves
Earth interior - seismic surface waves
Earth interior Modes of propagation of P-waves and S-waves: Terminology: SS = S-waves reflected at surface PP = P-waves reflected at surface PCP = P-waves reflected at CMB PKP = P-waves refracted in core CMB = core-mantle boundary
Earth interior
Earth as a planet - tectonics
Earth as a planet - tectonics
Earth as a planet - tectonics
Earth - plate mobility
Earth as a planet - tectonics
Evidence from seismic tomography for the subduction of the plate under Japan. Variations in shear-wave velocity, v. S Kustowski et al. (2006) Earth - plate collision & subduction