Granite Island granite.
Granite Island was once connected to the mainland. It has survived the force of the ocean while the land that once surrounded it eroded away. The granite that makes up the Island was formed about 10 km below the surface of the earth.
Extreme pressure in the earth's crust folded layers of sediment. At the same time, extreme heat melted the base rock. The molten rock was forced upwards into weak points in the earth's crust - Granite Island was located at one of these weak points. The molten rock cooled and hardened into granite. This happened about 480 million years ago. Over millions of years, the thick layers of sediment that covered the granite were gradually eroded away by water, exposing the granite beneath.
On this Island you will see lots of Granite, while at GZ you will find an odd "rocky" formation that borders the viewing area. Please message or email answers to the questions below which relate to this formation. You are welcome to log a "Found it" prior but answers will need to be promptly sent or unanswered "Found it" logs will be discreetly deleted.
Q1. What's the common name for the material this rocky formation is made from?
Q2. Is there any other similar rocky formation, what shape is it?
Q3. Optional, take a photo of your view at GZ & add to your log
Please do not include answers in your log or spoiler photos... these will be deleted.