Late Cretaceous to early Tertiary age, coal deposits were higher grade coal than the Pennsylvanian age deposits found in the eastern United States
Indicate whether the statement is true or false
False
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Which fossil fuel is the most abundant?
A. natural gas B. oil C. coal D. All of the choices are equally abundant.
There can be no variation of mineral composition in order for the substance to remain the same mineral
Indicate whether this statement is true or false.
Which of these statements about Earth's tides is correct? a. The tides consist of two very long wavelength waves
b. There are typically six hours between successive high tides. c. Most places on Earth have one high and one low tide per day. d. They are caused by convection currents in the mantle. e. They are caused by the gravitational attraction between Earth and Mars.
Which sediment size has the steepest angle of repose?
A) Gravel B) Sand C) Silt D) Clay