How is it possible for sandstone derived from sediment deposited in a beach environment to comprise a formation that blankets a broad region?

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions

Acanyon on the ocean floor at which the crust bends downward is called a(n)

In africa what do they call a crop grown for direct sale and not for use?