He wanted to go west, over the Wollondilly River, to show me a particular geographical feature he had seen on a trip back to his home from Cowra.
We flew just south of Bowral - towards Mt Jellore, which is west of Mittagong, and north of the Wombeyan Caves Road (at High Range). Mt Jellore is a near perfect cone which stands high above the horizon in this view (above where I have written its name). (Click to enlarge image)
Unfortunately, the weather was against us, when we got out towards the Wollondilly River, near Bullio. We circled around to see the clifflines and obvious hills out there, but many features could not be seen because of low cloud.Here is the Wollondilly Valley, with a cliff line from near Mt Wanganderry
which is the highest point on the High Range, along the Wombeyan Caves Road.
which is the highest point on the High Range, along the Wombeyan Caves Road.
Here is Mt Jellore, seen from close above.
This contour map image shows well how round this mountain is.It is over 800 metres high, rising out of the Nattai Valley and Wollondilly Valley.
The weather was against us, but what could be seen was pretty wild, and invites further examination - by 4 wheel drive vehicle, and on foot.This remarkable cliff formation is extremely narrow.
Without checking for names on detailed contour maps, I don't know if it has an official name.
I have referred to it as the Knife Edge Cliff, beyond Mt Jellore.
Without checking for names on detailed contour maps, I don't know if it has an official name.
I have referred to it as the Knife Edge Cliff, beyond Mt Jellore.
Even Jim was impressed with it, and graciously allowed another fly past, for me to get this shot.
It looks like a natural spot to find Peregrine Falcons, to me.Wonderful clifflines.
4 comments:
That sounds such a great flight over extremely interesting country. Would Mount Jellore be the eroded cone of a volcano? And would an uplift have made that knife-edge cliff? (Uh-oh! Hope I have remembered some of the right words! Hope you understand what I am asking!)
Perhaps eagles fly at the Knifedge too, Denis?
Hi Mick
Sorry for the slow response.
Yes, it is almost certainly a basalt plug. There are a number of them in the region. Old volcanoes which developed a flow which leaves behind a pimple of hard rock. From a volcano which was not so hot as to explode, like Mt Warning, or the nice ones in western Victoria which have a crater lake inside their little cones.
I could not find a geological map on the web to show that for sure. Certainly the rock type looks different in the images from the sandstone in the knife edge promontory, which is classic sandstone, eroded by two rivers - one on either side.
The rocks in Mt Jellore are not laid down in strata (as you can see in the close up shot of the "Knife Edge Cliff"). Those rock on Mt Jellore are more likely in a vertical alignment, more or less like columns or tubes of frozen lava. These are lava protrusions up through the much older sandstone strata, which occurs when a "hot spot" develops underneath the sandstone.
Mt Jellore is probably the last in a line of such small volcanic protrusions, starting from near Robertson, some 60 Km east. They left a ridge, with some free standing hills. Mt Jellore is the most isolated in out area - the volcano's last gasp, as it were.
Cheers
Denis
Hi Miss Eagle.
Certainly it is great Eagle country in there. You have seen images of Eagles flying near Bullio, in the same area, overlooking the Wollondilly River.
But I mentioned Peregrines because they nest on cliffs like the Knife Edge.
Cheers
Denis
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