Situated about 100 kilometers west of Sydney in an area called the Wollangambie Wilderness, is what looks like a regular meteor impact crater. Cone shaped, it is roughly 2 kilometers across with a crater in the centre. The walls are around 80 meters high. It is on the local survey maps. Many people hike into the area to see it.
But assumptions can be misleading.
An assumption is basically a best guess in relation to the facts that are available at the time.
Let’s have a look at the facts. For one it is a crater but with a channel cut thru the rampart. It is not volcanic as the cone material is only sandstone with no signs of the basalt, etc. normally associated with magma. While the cone is overgrown you can still see large and small sandstone blocks scattered everywhere.
Now it starts to get interesting.