Types of Fossils
This happens when an organism's tissues are replaced by minerals from water.
What are Permineralized Fossils?
This is what caused the Morrison Formation to begin.
What is a flood?
The collection of all known fossils and their placement in order from earliest to most recent.
What is the Fossil Record?
This is the era where scientists found a large increase in the number and types of fossils in rock layers. Many were arthropods.
What is the cambrian explosion?
This is the process of biological change by which populations become different from their ancestors over many generations.
What is evolution?
This happens when an organism, usually a plant, is quickly buried and flattened by enormous pressure of sediments built above it.
What are carbonized fossils?
This is how many years ago this event happened.
What is 150 Million Years Ago?
95% of all discovered fossils are these types of organisms.
What are marine organisms?
This is believed to be the main cause of the cambrian explosion.
What are increased oxygen levels?
This is an ancient species from which two or more species evolved.
What is a common ancestor?
This happens when an organism's tissues decompose and an impression is left behind. We worked with these in our lab.
What are Cast and Mold fossils?
This is the type of rock that makes up the Morrison Formation.
What is sedimentary?
This happens when all members of a species die out.
What is extinction?
This is a type of fossil that have body structures that are found both in n ancestral species and its descendants.
What are Transitional Fossils?
The study of the development of unborn or unhatched organisms is called this.
What is Embryology?
This happens when an animal gets trapped in sap and it hardens.
What are amber fossils?
Many fossils of the organisms are either scattered or this.
What is incomplete?
During a mass extinction, this happens to a large number of species at the same time.
What is death?
This Mass Extinction affected 50% of all species and caused the end of mammal-like reptiles, leaving mainly dinosaurs.
What is Triassic-Jurassic?
Scientists use Embryology to determine this.
What is common ancestry/similarities?
This happens when an organism becomes trapped in some way, dies and then is quickly frozen.
What are frozen remains?
This is the name of the Quarry within the Morrison Basin.
What is the Carnegie Quarry?
There are 3 main causes of mass extinction: Volcanic eruptions, climate warming or cooling, and this.
What is meteorite impact?
In order for a Tiktaalik to be considered a transitional fossil, it needs to have appeared here in the fossil record.
What is between fish and amphibians?
At some time during development, all animals with this have a tail.
What is a backbone?