18th July 2014
Nambung NP covers a coastal strip which includes several interesting places. The coast is beautiful, there are saline lakes and a few kms inland, a desert area with strange limestone pinnacles surrounded by kwongan heath.
|
Pinnacles at Nambung NP |
There are many theories about how the pinnacles formed; some scientists believe they are fossilised tree trunks, others say they are a dense mat of fossilised plants which held the dunes together. No one really knows. What is clear from looking at some of them is networks of fossilised roots and stems. After the plant matter became fossilised, sand was blown east from the coast and covered them completely. At various times in the last 500,000 years the columns have been exposed then covered over again. There are many more below the current ground surface.
The contrast between the yellow sand around the pinnacles and the fine white sand of the coastal dunes is stunning.
|
Pinnacles amongst the heath and coastal dunes |
The sand on the coast is so white it looks like snow. It is also extremely fine unlike the coarser coral sands further north and we had a great walk along the beach at Hangover Bay. We can only speculate how the bay got it's name but it should be renamed Eden Bay.
|
Snow white sand and turquoise water at Hangover Bay |
Lake Thetis is one of a string of lakes behind the coastal dunes running down this coast.
|
Stromatolite at Lake Thetis |
About 4,000 years ago the connection to the sea was blocked by sand and as the water evaporated it became very saline, a condition in which most life cannot survive. However, stromatolites which we have already encounterd in Shark Bay thrive in these conditions and the lake is full of them.
|
Lake Thetis |