Wednesday, October 18, 2017

Dinosaur turd

These dinosaur poo photographs are funny and Freda is so cute  :-)
Photographer: Tania Kayrala, 2017 October
Location: A cave in Rock Island, Wollemi National Park, NSW, Australia

I am joking, it is not dinosaur shit. It is a stalagmite.

Now, in a limestone cave, stalactites and stalagmites are composed of deposition of calcium carbonate and other minerals. But here, it is formed by mud dripping down from the ceiling.

A photograph of the ceiling of the same cave is:

Photographer: Paul Ma, 2017 September
Same location as the pics by Tania Kayrala

When a stalagmite reaches the ceiling, it becomes a mud column ... as in the 2 pics below:
(But I'm no where as cute as Freda.)

Photographer: David Hou, 2017 October
Location: near Goochs Crater, Blue Mountains National Park, NSW, Australia

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