US Geological Survey
Usgs: How to Build a Model Illustrating Sea Floor Spreading
This is a comprehensive website featuring how to build a model that illustrates sea-floor spreading and subduction. It has diagrams and pictures reviewing major geological concepts.
Incorporated Research Institutions for Seismology
Iris: Earthquake Machine: Basic One Block & Simple Graph Animated
Animation of the single-block "Earthquake Machine" model shows how "Forces, Faults, and Friction" interact. [0:16]