The geology of Western Australia spans 4.4 billion years of Earth's history — from the oldest dated zircon mineral grains at Jack Hills and ancient 3730 million-year-old Archean gneiss in the Narryer Terrane, to recent sediments forming right now on the Swan Coastal Plain around Perth. Reference: http://www.dmp.wa.gov.au/Geological-Survey/Geology-of-Western-Australia-1389.aspx
At the car park and just closer to the coast at Point Louise you will have spectacular views north and south of the very rugged coast line, which is all made up of mainly limestone (Tamala Limestone).
Tamala Limestone is the geological name given to the widely occurring eolianite limestone deposits (is any rock formed by the lithification, or the process of rocks being formed by small particle of carbonate and marine organisms being compressed to form the rocks that make up the coast) on the western coastline of Western Australia between Shark Bay in the north and nearly to Albany in the south. The rock consists of calcarenite (sand sized particle of either corals, shells, ooids or calcium carbonate and pellets) wind-blown shell fragments and quartz sand which accumulated as coastal sand dunes during the middle and late Pleistocene or the Ice Age, some 2,580,000 to 11,700 years ago, and early Holocene, which is from about 12,000 years ago to present. As a result of a process of sedimentation and water percolating through the shelly sands, the mixture later lithified when the lime content dissolved to cement the grains together.
To log this EC please answer the following:-
1 Roughly how big or small are the holes visible at GZ and what caused this amount of variation?
2. What is the main colour of the rocks and is there a change in colour and what might have caused this?
3. Take a photo of you or your team or your GPS at or around GZ.
Please feel free to log this cache at your earliest coinvienience, however the answers MUST be sent via my profile contact details within 10-12 days or the find log maybe deleted.
Congratulation to Two + Four for FTF honours!