This is an earthcache. You must read the geology lesson and message me the answer to questions below to be able to log this cache.
Granite
Granite is an often misidentified igneous rock formed by cooling magma, allowing crystals of different minerals to form throughout it. Different granites are formed by many types of minerals, but granite by definition must be at least 20% quartz and 35% feldspar. This earthcache will have you identifying two different rocks, both often identified as granite.
Feldspar:
Although there are many types of feldspar, the types that can be seen in this memorail are mostly potassium and plagioclase feldspar, which can be identified by their reddish orange and light gray colors, respectively.
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Quartz:
Quartz is a very common rock in granite that can be identified by its solid white color, and sometimes even slightly see-through color.
Biotite:
Biotitite is a type of mica that can clearly be identified by its dark black color.
Amphibole
Amphibole is another type of mica which can be identified by its darker gray color.
Please message me the answers to the following questions. Logs without answers sent to me beforehand (and without a photo) will be deleted.
At the posted coordinates, you will see a rock with writing in both Korean and English text, titled Pohang Mugunghwa Walkway.
1) Find a 6'' by 6'' section of the rock. Determine what percentage of the surface is covered by each of the above minerals. (e.g. 50% feldspar, 30% quartz...)
At the waypoint below, find the rock with the plaque honoring women who served in the Korean War.
2) Find a 6'' by 6'' section of the rock. Determine what percentage of the surface is covered by each of the above minerals.
3) Given that granite must have a composition of at least 20% quartz and 35% feldspar, are either of these rocks granite? Which one?
4) Take a picture with you or a personal object that proves that you visited the memorial.