Roberts Beach Potholes

Roberts Beach is a picturesque beach located in The Entrance. The beach is approximately 500 meters long, and has many rock formations, a survey marker and free parking/amenities 24/7. Only a short walk from The Entrance city centre, the beach is usually quieter than the main beaches of the entrance which makes it a perfect place to come and relax. For those interested, there are also some short bouldering walls on the northern side of the beach.
 

Pothole Geology

A pothole is formed when a circular current of water carrying small pebbles and sediment begins to wear away a rock surface. The force of water and the sediment it carries is greater than the resistance of the rock. Once the process has begun, it continues and the rock in that location continues to erode away.

Although usually formed in fast-flowing riverbeds, these potholes can form on wavecut platforms, like the ones evident here. Strong outgoing waves that contain sediment and stones can form the divot, or 'eddy' in the rock, and as the waves continue to crash up over the platform, these eddies get deeper and deeper, forming the potholes evident on the beach.

Larger sediment like rocks and stones can form rougher and larger potholes, but smaller sediment like sand and dirt tend to form smoother, smaller and more regular potholes.

Questions and logging requirements

Photo requirement

Take a photo similar to the one shown below, you do not need to show yourself or your face in the photo, but you need to have one of your personal items, like a pathtag, your caching name or your GPSr in the photo.

Question 1.

Describe the texture, overall shape and average dimensions of the potholes evident at GZ

Question 2.

Using the information from question one, Do you believe that larger or smaller rocks caused the formation of these potholes, or a mixture of both.

Please message these answers to me within 10-14 days of logging a find, and upload your photo along with your online log or your log will be deleted without warning.