Black "granite" from the Black Hill quarry is actually not granite. The stone is in fact another form of igneous rock known as Gabbro. The mineral name Gabbro refers to a large group of dark, often coarse-grained intrusive igneous rocks chemically equivalent to basalt. Gabbro is dense, dark-colored and contains pyroxene, plagioclase, and minor amounts of amphibole and olivine.
Taikurrendi means 'coming together'.
Near GZ you will find several Black Granite boulders placed to honour the Kaurna people.
The Kaurna are the original people of Adelaide and the Adelaide Plains. The area now occupied by the city and parklands – called by the KaurnaTarntanya (red kangaroo place) – was the heart of Kaurna country. Before 1836 it was an open grassy plain with patches of trees and shrubs, the result of hundreds of generations of skillful land management. Kaurna country encompassed the plains which stretched north and south from Tarntanya and the wooded foothills of the range which borders them to the east.
To claim this earthcache you will need to email me the answers to these following questions.
Q1 To the south of GZ you will find Black "Granite" spikes forming a curved fence, How many are there and what is the approximate height of these spikes ?
Q2 The boulders have been cut and polished. Examine the surface and describe the grain structure? Can you see any reflective grains.
Q3 Can you see any quartz veins in any of the boulders and if so which ones ? Use the names carved on the cut surface to identify the stones.