Kurrajong Fault

posted in: Landscapes | 0
Geology map Richmond area showing north-south Kurrajong Fault on the left side of the image.
Geological map of Richmond area showing north-south Kurrajong Fault on the left side of the image.
Question from a reader:

I’m finding your site fascinating. I live in Kurrajong Village [in the Blue Mountains north-west of Sydney, Australia] and was wondering where exactly the fault in my area runs? Do you have a map with the streets and roads marked on it?

My reply:
I’ve posted an image here showing the location of the fault. The image is from the 1:250,000 scale geological maps number si5605. You can download the complete map from the Geoscience web site. (You have to click on the correct rectangle to get the correct map.)”

Road cut along Old Bells Line of Road exposing Hawkesbury Sandstone near Kurrajong fault
Road cut along Old Bells Line of Road exposing Hawkesbury Sandstone near Kurrajong fault
The Kurrajong Fault is marked on the map together with some roads so you can locate where you are. From Bells Line of Road you can see the strata in a road cut and how they curve downward at the western end of the road cut. Look south at the western end of the road cut from this location shown on Google Maps.
 
On this image (see left) from the street view from Google you can see the cutting. When you look at the cutting from the RH (north) side of the road you get a good view of the strata comprising the Hawkesbury Sandstone, and you can see how the strata turn downwards as a result of the Kurrajong Fault, as you move along the cutting at the western end. The strata are not so clear in this photo.
 
The Hawkesbury Sandstone in the image would have been deposited toward the middle of Noah’s Flood as the waters were rising.