Why are dinosaurs buried so deep? Did rock form over them?
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To understand this a bit easier, take a look at older (50+) neighborhoods in your area. You’ll often see that sidewalks are sunken into the yard. However, it is actually the opposite. The grass clippings, dust from the sky, dead microorganisms, and the like have becomes new layers of dirt and the yard has slightly risen from when the concrete was first poured.
Repeat this for 100s of millions of years and you get layers of sediment that turn into rock. Dinosaurs are less buried than they were covered over and over again.
A similar process happens with human ruins. The tall stuff falls down and what remains is covered over time with plant matter, dust and dirt, which eventually completely covers the ruin. It turns a former building into a small hill or a grassy depression.
Yes, exactly.
Fossils only form in sedimentary rock. Those are rocks formed from sediment (dirt, sand, clay, etc), so if something dies in the right conditions, it gets buried in sediment, that sediment forms into rocks, and the organism’s body decays and then gets replaced with different sediment, preserving the shape of the organism.
Igneous rock (made from lava) can’t form fossils because the heat of the lava destroys the organism
Metamorphic rock can’t form fossils because the heat and pressure necessary to make it (during the metamorphosis from either igneous or sedimentary rock) would warp and destroy any fossils that may have been there.
The layers of rock being used to date fossils is quite useful, and it is how we know an asteroid impact killed the dinosaurs. All dinosaur fossils we have ever discovered have been below a very thin sedimentary layer containing metals like iridium that would have come from an asteroid impact.
The flood in Genesis seems a very good way to have this happen all over the world in a rather quick amount of time.
The earth is old. Really really old. You might think your great aunt Cathy is old, but the earth is WAY older than Cathy. Not hundreds or thousands of years old, but billions of years old. The dinosaurs evolved about 250 million years ago, and went largely extinct about 70 million years ago. Since that time, continents have moved, ice ages have been and gone, mountains have formed, rivers have deposited kilometres of sediment. Dinosaur bones have been buried by millions of years worth of erosion, deposition, sedimentation. Sometimes the rock they are in got bent upward, or been brought to the surface by rocks shifting and cracking. We can find those bones relatively close to the surface. There are many more bones buries so deep we will never find them.
Let’s say you’re a 50 foot tall dinosaur and your best friend, Melvin, is also a 50 foot tall dinosaur. Now, as you probably know, the average human person is somewhere between 5 and 6 feet in height. But, we like to bury our dead buddies at a depth of 6 feet underground for the most part. This way, we don’t accidentally dig them up when we’re playing in the sandbox. So, if you’re 50 feet tall, are you only going to bury your buddy 6 feet under where you might accidentally uncover him when you’re playing in the sandbox? No way, you’ve got to go deeper! So, as a dinosaur, you will like to bury your buddies at least 50 or 60 feet down. All this talk about rocks and geologists, they just don’t get us 5 year olds playing in sandboxes.
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It’s survival bias. Only the dinosaurs which were buried in the rock can turn into fossils that can be found by us. The ones on the surface were destroyed by the environment and became dirt.
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