Thursday, January 20, 2011

53. Lava Tubes - Ravenshoe

MORE BROLGAS


There is an abundance of these birds up north. The country is ever changing , but for the time being it is floodplains as far as the eye sees.





LAVA TUBES

The tubes are the result of a lava flow from a huge volcanic eruption thousands of years prior. In brief what we see today is the outer surface of lava that cooled quicker than the internal mass. Think of water in a hose; the hose is the outer lava that cooled quicker , and the water within the hose is the hotter lava still running downhill. Eventually these caves end where the inner mass of lava cooled and formed a ‘plug’. Over time vegetation would have grown over the top of the lava tubes so that no one would have known of their existence but as time has passed the roofs of the tunnels have fallen through in some parts, possibly weakened by tree roots or water seepage & the tubes exposed. This was a great adventure.




RAVENSHOE

Finally after almost 750 kms we have found green, cool, misty hills. The previous night we had camped 8kms off the track on a station. The air was hot & still & at 3.30am it was still stinking hot. As much as we had enjoyed our outback experience the freshness of the coastal highlands was soothing.

We had a German Gypsy join us for our night stop in Ravenshoe. Ellie has been travelling the world for the last 8 years & we all had a great time together. It was good that Kaz had some female company for a change; she also made a great nanny. Safe travels Ellie.