When the geologist propels down into the Grand Canyon, he finds the Esplanade Sandstone. How did this rock form?
Sand dunes
Marine fossils
From rivers
Glaciers​

Scientists think that convection currents flow in earth’s a. continents. b. mantle. c. lithosphere. d. inner core.

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Will give brainliest asaap plz im in a major hurry to finish which of these pairs of objects exerts the greatest gravitational force on each other? object 1 and object 3 object 4 and object 3 object 1 and object 4 object 4 and object 2