Students learned the concept of superposition, where the oldest sediment or rock layers are on the bottom of an exposed outcrop. However, due to various forces, such as movement of the plates that make up the Earth’s crust, or changes in water bodies, the relative position of rock layers can change. Understanding geology is important in dating fossils and determining the dynamics of landscapes.

Dr Chris Lepre is explaining today’s exercise.

Walking across the landscape just outside the TBI compound.


Alexa and Chris are measuring the height and composition of the exposed layers of sediment.

Alexa, Chris, Benson, Michelle and dog Poppy are resting in the shade after successfully completing today’s exercise.