Some of the basalt lava flows abut and terminate against red sandstones. Here on the beach and in the cliffs you will be able to observe the termination of lava flows. Fish scales are abundant. The McCoy Brook represents several important palaeo-environments. The first of these is a lake deposit.
Geologists interpret the grey shales rich in fish fossils as the lake deposit.
The red-orange sandstones are interpreted as sand dune deposits. With diligent searching you can find ventifacts and determine the dominant wind direction.