Here are the lecture recordings for this week's lectures.

Lecture 2A: Structure of Earth's interior; plate tectonics

Note: lecture recording starts at 42:46

Echo: http://lrs.unisa.edu.au/ess/echo/presentation/ddc62ee9-bb00-45fa-853e-edf90521f7ad
Video:

Lecture 2B: Weathering and erosion

Note: lecture recording starts at 1:05:35

Echo: http://lrs.unisa.edu.au/ess/echo/presentation/671385a4-4b66-47ce-879c-ba6432fda3fa
Video: