|
Canal Rocks
Canal Rocks is a series of granite rocks in the Indian Ocean, just off the coast situated approximately south of Yallingup, Western Australia, Yallingup in the South West (Western Australia), South West region of Western Australia. The Noongar name for this place is . The rock formation takes its name from the narrow channel between the rocks that has formed from the coastal waters eroding the granite-gneiss away over time. The rocks that make up the canals are part of the Leeuwin-Naturaliste Ridge, or Leeuwin complex. The rocks that make up the feature consist of hornblende-biotite monzogranite gneiss that are medium to coarse-grained and moderately foliated containing minerals such as perthite, quartz, hornblende with accessory biotite, opaques, apatite, and zircon. The original rock that underwent medium metamorphism was granite. The estimated age of crystallisation is 702 ± 7 million years. The Cape to Cape Track passes near the lookout over the rocks. Facilities at the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite
Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dike (geology), dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF diagram, QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) conta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
