If All the Dinos Died on One Terrible Weekend – Where are All the Bodies?

asteroid
Creative Commons License photo credit: goldenrectangle

According to the Impact Theory, a rock from space smashed into the earth, threw up a huge dust cloud, chilled the atmosphere and sent down acid rain.  All the dinosaurs died immediately all over the globe or in a week or so.

So….where are the bodies of the victims?

Probability of Becoming a Fossil: 0%     or    100%

0%
If you die on a high plateau or a grassy meadow or on the average forest floor, far from the influence of river floods, your bones will get chewed, cracked, smashed and digested by scavengers. The remnants will get dried up and will flake away to nothing under the sun. Or, if the ground is wet, worms and grubs and fungi will destroy your osseous remnants.

That happens to most dead bodies, most spots, most of the time. Or…

100%
What if you’re lucky enough to die in a depositional basin, where yearly floods bring in layers of sand, silt and mud, and where lake bottoms accumulate blankets of sediment all the time. A place where huge sand bars develop in streams and rivers….

….then the possibility that some of your bones will get buried and fossilized rises to close to 100%.

Dino Extinction Supposedly Hit While Montana Was Getting Sediment
At the time of the Great Dino Die-Off, no sediment was being laid down in most places in the world. But in Montana’s Cretaceous coal fields, there were many swampy lakes and sluggish rivers, locales where mud and sand was being carried in. This depositional activity seems to have continued right through the end of the Cretaceous and beginning of the next Period, the Tertiary (“Age of Mammals”).

In fact, field geologists have a hard time telling where the Cretaceous mud ends and rhe Tertiary mud begins.

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Creative Commons License photo credit: etee

If the Impact Theory is right, millions of Triceratops carcasses littered the landscape. Tens of millions of duck-bill dino bones also covered the ground. And….there were no big scavengers to crack the bones. The average dino body would last far longer than usual. Some of the impact victims should have had a high probability of being buried in the mud at the Impact Layer, the sand and silt and mud deposited right after the rock from the sky struck.

Total number of dino bones found right at the Impact Layer – 00.00.

That’s  one reason why I am an Impact Skeptic. You have to do some special pleading to explain the lack of dino bones at the impact layer. You could argue that soil acid dissolved the bones. Or that for a hundred years there was no new mud, no new sand, no new silt.

Could be.

Still, I like to begin with a geological peshat (first impression): When I scan the actual facts on the ground, there is no evidence whatever of a sudden massive death of dinosaurian multitudes at the Impact Layer.

I dinosauri a Cremona
Creative Commons License photo credit: Simone Ramella

Evidence for a Long, Slow Disaster
There are clues that indicate the dino ecosystem was deteriorating long before the impact. The diversity among big, multi-ton dinos went way down about 5 to 10 million years before the end. In the Latest Cretaceous (Lancian Age) in most places in Montana, there are only two common big dinos – either Triceratops or the duckbill Edmontosaurus. It was a dino-monoculture.  At 76 million years ago diversity was much higher.

Serial Killer in Deep Time
The biggest reason I’m a skeptic is the victim profile. When the dinos finally went extinct, salamanders, frogs, pond turtles, river gators all survived and thrived. So did most small terrestrial species. That pattern holds for six other mass extinctions – beginning at 285 million ears ago, long before the first dino. And the pattern is obvious in the last extinction at the end of the Ice Age, 11,000 years ago.

Impact Theory Fails to Predict the Correct Victim Profile
Sudden chill and acid rain will wipe out salamander-oids and frog-oids and turtle-oids. And hit big, active animals far less severely.

The wrong animals died.

Read about my dinosaur extinction theory in an early blog post.

The study of dinosaurs and the modern world

Our guest blogger today is Dorothy, who runs the blog site Dinosaur Home. Though she originally majored in philosophy working with computers, her true loves are natural history and paleontology. Here, she’s combined all of her talents to share a post on the importance of dinosaur research for the modern world.

Being fascinated by dinosaurs, I’ve often heard the question “why are creatures that disappeared from the earth so long ago are the center of so much research.”
I believe that the answer (at least as I see it) might be surprisingly simple and I’ve decided to focus on two aspects.

1. Researching prehistoric creatures such as the dinosaurs is a really excellent way to learn how evolution works. One of the best ways to study evolution is to have as long a timeline as possible. A researcher today would need to examine and study a species over many years to see how they change and adapt to changing circumstances. When we examine fossils from millions of years ago we are given a rare glimpse into the dinosaur’s existence and even the rare opportunity to see what they have evolved into – birds. Without the study of prehistoric creatures it wouldn’t be possible to get the whole picture of the changes of biology over a really long time.

2. Research into the story of the disappearance of the dinosaurs is actually a very relevant one. The changing climate that we experience today might be something that reminds researchers of other cycles of climate changes years ago. Whether it was an asteroid, climate changes, changes in the earth’s gravity or any of the other explanations that have been offered, there is a direct relevance to our lives today.

 Sometimes if we want to know what is possible, or what might happen, we have to learn about what has already happened. It is an important scientific goal to investigate various possibilities. If Antarctica was once a snow free continent it might be snow free again. If there are dinosaur fossils found on different continents with similar heritages it certainly helps us imagine the globe very differently than its modern structure.

People all over the world have the tendency to imagine the reality they know as the only possibility; it is thanks to the study of dinosaurs and natural history that we can open our minds to very different realities.  The less knowledge we have, the more reluctant we are to admit changes that are happening and that will continue to happen. The Buddhist call it the “recognition of impermanence” and attribute a lot of importance to it. They believe it is vital to the process of becoming more aware of the impermanence of ourselves, and helps us become less ego centered. In fact the whole theory of there being no self says just that “we are all just a flow of events and changes that never starts and never ends.” It works for the whole picture as well.

Few subjects in the Earth sciences are as fascinating to the public as dinosaurs. The study of dinosaurs stretches our imaginations, gives us new perspectives on time and space, and invites us to discover worlds very different from our modern Earth.
From a scientific viewpoint, however, the study of dinosaurs is important both for understanding the causes of past major extinctions of land animals and for understanding the changes in biological diversity caused by previous geological and climatic changes of the Earth. These changes are still occurring today. A wealth of new information about dinosaurs has been learned over the past 30 years, and science’s old ideas of dinosaurs as slow, clumsy beasts have been totally turned around. Although much has been discovered recently about dinosaurs, there is still a great deal more to learn about our planet and its ancient inhabitants.

For more from Dorothy, visit her blog, Dinosaur Home. For more on paleontology, check out:Dimetrodon sighting!
Roberta, the other brachylophosaur
What’s it like to discover a dinosaur?