Southern Cross Province
The Southern Cross Province lies in the central area of the Yilgarn craton. The Marda–Diemals greenstone belt in the Southern Cross Terrane can be divided into three layers: the lower greenstone belt (ca. 3.0 Ga) characterized by mafic volcanic rock and banded iron formation, a felsic-intermediate volcanism layer, and an upper sedimentary layer (ca. 2.73 Ga) of calc-alkaline volcanic (Marda Complex) and clastic sedimentary rocks (Diemals Formation).
East–West orogeny (ca. 2730–2680 Ma) occurred in two stages; an earlier folding phase and a late phase that resulted in deposition and deformation of the Diemals Formation. Subsequent orogeny (ca. 2680–2655 Ma) resulted in shear zones and arcuate structures.
The lithostratigraphy of the Marda–Diemals greenstone belt are similar to the northern Murchison Terrane, but has older greenstones and deformation events than the southern Eastern Goldfields Terrane. This indicates that the Eastern Goldfields Terrane may have accreted to an older Murchison–Southern Cross granite–greenstone nucleus.
Read more about this topic: Yilgarn Craton
Famous quotes containing the words southern, cross and/or province:
“I prefer to make no new declarations [on southern policy beyond what was in the Letter of Acceptance]. But you may say, if you deem it advisable, that you know that I will stand by the friendly and encouraging words of that Letter, and by all that they imply. You cannot express that too strongly.”
—Rutherford Birchard Hayes (1822–1893)
“All pathways by His feet are worn,
His strong heart stirs the ever-beating sea;
His crown of thorns is twined with every thorn;
His cross is every tree.”
—Joseph Mary Plunkett (1887–1916)
“It is the province of knowledge to speak, and it is the privilege of wisdom to listen.”
—Oliver Wendell Holmes, Sr. (1809–1894)