Two plates that are made up mostly of oceanic crust are the Pacific plate and the Nazca plate.
Explanation:
There are numerous tectonic plates that divide the surface of Earth, and they can be divided into oceanic plates and continental plates. Another division commonly used is major plates. minor plates, and micro plates. The oceanic plates are plates that are mostly made up of oceanic crust, and the land masses on them are consisted of island arcs, mostly of volcanic origin. Some of the oceanic plates are:
- Pacific plate
- Nazca plate
- Cocos plate
- Caribbean plate
- Scotia plate
The Pacific plate is the largest oceanic plate, and it is a major plate. It is dominated by ocean, with numerous island chains scattered across it. This plate is shrinking from all sides as it has subduction zones with all of the continental plates that surround it. The Nazca plate is another oceanic plate, being located between the South American and Pacific plates. It is a minor plate, and it has a subduction zone with the South American plate, which has resulted in the formation of the Andean Mountain Range.
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Answer:
C. Principle of original horizontality
Explanation:
The Law of Original Horizontality suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed. This allows us to infer that something must have happened to the rocks to make them tilted.
B, provide systematic irrigation.
Granite
T: Phaneritic, Pegmatitic
P: Craton. Near Intrusive bodies such as a batholith
Plutonic
Minerals: Major: Plagioclase, K-spar
Granite #2
T: Phaneritic
P: same as above
plutonic
minerals: Major: Kspar Minor: Quartz and plag
Syenite:
T: Phaneritic
P: intrusive body. common in sills and more mafic bodies.
minerals: mainly alkali feldspar and amphibole
