How do oceanic and continental crusts differ? How do scientists know that they are different?
What will be an ideal response?
There is a variation in composition and density, and thickness. Drilling into the sea floor and continental crust, and detection of ophiolites, where oceanic crust is accreted to continental material, provide opportunities to study the crust directly. Seismic reflection and refraction allow them to image the lithosphere.
You might also like to view...
What percent of children in Sub-Saharan Africa dies before the age of five?
A) 0.2% B) 2.0% C) 20% D) 12.2% E) 2.2%
Coal is composed of
A. a combination of oil-rich sediments and calcareous ooze. B. petrified wood. C. buried plant material that has partially decayed. D. buried animal material that has partially decayed.
The Morrison Formation contains one of the richest assemblages of mammal fossils. Indicate whether the statement is true or false
An outflow boundary is
A) the leading edge of cold air from a thunderstorm downdraft. B) a favorable place for future severe storm development, especially if two intersect. C) can be clearly seen on radar images. D) all of these