Data collected by the drilling ship Glomar Challenger confirmed that none of the ocean floor is more than about 180 million years old.
Glomar Challenger began drilling on both sides of the mid-ocean ridges to gather data. The data confirmed what the sea-floor spreading hypothesis predicted. The ocean floor is youngest along the central valley of the mid-ocean ridge while the ocean floor in subduction zones or near the edges of the continents is oldest. The data has confirmed that none of the ocean floor is more than 180 million years old because the older oceanic rock will undergo subduction and go back to the earth's mantle.
Answer:
monarchy, aristocracy, and democracy
this is correct.
Answer:
no not really you just say where you live at
Explanation:
Answer:
None of the above
Explanation:
The Bowen reaction series provides an insight to what happens to a crystallizing magma as it cools. There are two arms in the series, the continuous and the discontinuous series. The continuous series is made of the plagioclase feldspar. At high temperature, calcic plagioclase are crystallized out of the melt and at lower temperature, sodic plagioclase begins to from.
The discontinuous series consists of the trend through which other minerals are crystallized. At high temperature, olivine first forms and quartz is the last to crystallized out.
For a given melt, according to the Bowen's reaction series, the composition becomes more felsic at low temperatures. The silica content increases considerably.
The series is designed for silicate minerals found in nature and not sulfate minerals. The continuous series is for plagioclase feldspars not amphibole. Amphibole is in the discontinuous series.