Large plate tectonics or the fossils had wings.
Obviously the soil and rocks that are now on top of the mountain were once underneath the ocean. This occurs when the ground is raised up from beneath the sea by plates colliding and raising mountains.
Fossils found in rock at the top of mountains indicate that the rock was once at the bottom of a body of water because the fossils are typically of marine organisms that lived in water. The presence of marine fossils in mountain rock suggests that the rock was uplifted from below sea level to its current position at the mountain top over millions of years.
Ocean fossils found on top of the Rocky Mountains indicate that these mountains were once underwater. Millions of years ago, tectonic plate movements caused the ocean floor to uplift, forming the mountains we see today. This geological process, known as orogeny, often results in marine sediments being elevated to high altitudes, revealing the ancient marine environments that existed in those areas. Such findings provide crucial evidence of the Earth's dynamic history and the shifts in its geological features over time.
Most fossils are found in sedimentary rock. This is because sediments (soil, sand, etc) pile on top of bones and then solidify into rock, over time, preserving fossils. Because these generally remain buried very deep, it does make it easier to find fossils in areas where the ground has been pushed upward by the formation of mountain ranges. Thus, sedimentary rock is nearly always the material fossils are found in, and mountains make it a little easier to find fossils.
because they were covered by oceans millions of years ago.
alpine
Fossils found in the same rock layer or strata are assumed to be of similar age and were likely deposited during the same time period. This allows scientists to infer the relative ages of the fossils based on the layer they were found in. Fossils within the same layer can provide valuable information about the environment and species that existed during that specific time period.
The fossils found at the top of a canyon will probably be younger than those at the of the bottom of the canyon because the fossils at the bottom of the canyon would have been there earlier when the so called "canyon" was once a flat land, so as time went by, the flat land began growing and getting taller and finally became a canyon so the fossils at the top of the canyon WOULD be younger than those at the bottom because the bottom fossils were there before the top of the canton even existed.
The furthest down of all top layers.
alpine
They are called index fossils, fossils of organisms that were widespread, evolving quickly, and only appeared in the geologic column for a specific length of time.
James Marshall and john sutter