Answer:
Index fossils, intrustions and cross-cutting relationships.
Explanation:
The correct list of three different geologic features that help scientists determine the relative ages of rocks by their position is "index fossils, intrusions, and cross-cutting relationships".
Earth's geosphere contains 99.94% of its mass. Hope this helps!
Answer:
Weathering
Explanation:
Weathering is the process of breakdown of rocks through the action of wind, air, water and by the action of organisms. The metamorphic rocks get gradually converted into sedimentary rocks through this process. The big rocks change into small rock particles called sediments.
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Appalachian Mountains. It has been said that they were as tall as the Rocky mountains. I hope this helped. :)