Sunday, February 25, 2007
The pictures that are included in this entry are of an area that everyone who has driven the Kangaloon Rd will know quite well. It is an area that has had water crossing the road as long as I can remember - some 24 years.
The water is due to a major fault line that passes under the road allowing springs to release this water to the surface - most likely originating at the aquifer.
As you can see the road is dry, even after all the rain we have had, and has been for some time now.
Many months ago Denis asked me on a field trip so that I might have a better idea of the surrounding geology. From what I saw I arrived at a theory that these fault lines would act as a straw that would effectively drain underground water back to the point of its removal - a conjunction of fault lines on the Tourist Rd where bores are positioned, thus allowing a much larger area to be affected than previously thought. A theory I discussed with Denis at the time.
Soon after, at a REPS meeting, I was able to get a map from Leon, good on ya mate, showing fault lines in the area. This map I passed on to Denis, and it may be viewed on his August blog of last year.
It is my belief that this now dry section of road is evidence that this theory has some weight.
When a fault is charged with water, it is buffered somewhat as water cannot be compressed.
If water is removed - so is the buffer.
This has the potential to cause movement in the fault.
Recently I was talking with a woman from Kangaloon who said she experienced a tremor event that, while quite possibly localised to her area, shook her house quite violently.
She tried soon after to get water from her tap, only to find that mud came out.
It seems that the movement she experienced had affected her bore.
This all happened BEFORE the recent rains.
She also informed me that authorities had told her previously that if her bore dried up, water would be supplied to her at no cost.
This information, with the woman's contact details, was passed on to Denis so that it could perhaps be incorporated into his strategy for halting this project.
Although this site is dedicated to the natural world, I cannot claim to be a naturalist. I can claim to be an amateur geologist, having started at the age of 4, sitting on my dad's lap, studying gemstones and the formations in which they reside.
Some may have alternate reasons for the tremor that was reported and I have no doubt that water passing through porous layering can cause movement - a process I have witnessed firsthand as a plumber, though this event happened before the recent heavy rains.
Not only do we face potential drying up of the area, but perhaps large earth tremors as well.
The Geology of this area is delicate. Only time will tell if I am correct in my assumptions.
Lets hope I am wrong.
Thursday, February 22, 2007
This one caught in the act of building a early morning web, with the hind leg just about to pick up the web from the spinnerets and fix it to one of the strands radiating from the centre.
Saturday, February 17, 2007
Wednesday, February 14, 2007
After the rain, a rain forest is the place to be to spot fungal blooms.
Robertson's last remaining pockets of such forest are alive at the moment with a myriad of fungal forms, as well as creatures taking advantage of the damp sun dappled conditions.
After school my daughters Rhiannon and Aeron accompanied me on a scouting trip to see what we could find
It is most important that these areas are disturbed as little as possible, so as to maintain them in as pristine a condition as we can. When visiting it is important to keep to the track taking only photos and leaving only footprints.
The work done by local land care groups has been essential in the preservation of these areas - Keeping grasses and weeds from invading often subtle and delicate systems.
These tiny fungi pictured are growing on stems no bigger than a hair. The trunk on which they grow is mattered with such hairs and only flowers when conditions are right for spore dispersal.
Monday, February 12, 2007
Around 1pm on the Sunday I decided to head out to Bowral.
The rain had eased to steady as I took Kangaloon Road.
Friday, February 02, 2007
The last of the Magpie hatchlings are getting the boot from their nests at the moment with a few still getting a feed such as this one pictured.
Magpies pair off for mating, with excess males joining a gang of birds that will pack hunt food.
Earlier in the season we had a young bird that believed it should still have its food supplied. It adopted us to the extent of being a regular visitor in the kitchen should we leave the back door open even a little.
If you feed native birds it is best to check the correct food types for them - remembering that your help may artificially swell numbers beyond their natural limits causing a food shortage if you decide to stop.