Tilted layers of sandstoe found in the Rocky MOuntains indicate that

1 sandstone was dpostied at the tops of the mountains

2 the oceans were once higher then they are now

3 sandstone layers were formed and then displaced

4 the oceans rose, deposited sandstone, and receded

Tilting of layers is a type of displacement.

The correct answer is 4. The tilted layers of sandstone found in the Rocky Mountains indicate that the oceans rose, deposited sandstone, and then receded.

To arrive at this answer, we need to understand how the tilting and deposition of sedimentary layers occur. Sedimentary rocks, such as sandstone, are formed through the accumulation and lithification (compaction and cementation) of sediments. These sediments can be transported by water, wind, or ice and deposited in different environments.

In the case of the Rocky Mountains, the presence of tilted layers of sandstone implies that some geological processes caused these layers to be displaced and tilted from their original horizontal position. This tilting can occur due to tectonic activity, where movements of the Earth's crust cause rocks to be folded or uplifted.

The presence of marine fossils within these tilted sandstone layers indicates that they were originally deposited in a marine environment, possibly when the ocean level was higher than it is today. Over time, as tectonic forces caused the mountains to rise, the layers were uplifted, tilted, and exposed to the surface.

Therefore, the most logical explanation is that the oceans once rose, deposited sandstone layers, and then receded, leaving behind the tilted rock layers seen in the Rocky Mountains.