I believe it is Istanbul with 11,400,000 inhabitants located in Turkey.
Sedimentary, like sand.
Weathering and erosion make large rocks smaller.
Superposition is the geologic principle which explains why the bottom stratum in a section of rock is the oldest. The word literally means placing one thing on top of another where the lower strata are the older.
The great rift valley was formed by violent subterranean forces that tore apart the earth's crust. These forces caused huge chunks of the crust to sink between parallel fault lines and force up molten rock in volcanic eruptions.
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