0
What else can I help you with?
Why are their so many well-preserved fossils?
There are so many well preserved fossils because there are so many fossils, some will be well preserved. In certain locations at certain times the conditions will be right for preserving living tissues.
Which radiometric dating method would be ujsed to date objects found at effigy mounds?
Carbon-14
What are some methods of identifying the age of fossils?
it can be matched to another fossil that can be visually identified as being from the same animal, and then can be matched up to the period the animal lived...or the second method would be to do a radio carbon dating test....but the fossil would have to be fairly old because the carbon dating can tell you how old something is within a few thousand years.
How is the relative age of fossils determined?
It is generally determined by how long it has waisted away or if it has reached a certain disintegrating phase (an example would be a half-life). By learning how long a fossils minerals and dead cells have wasted away biologists can learn how old a fossil is relative to a period or our own time on earth.
What are fossils used to determine the relative ages of rock layers?
The age of a fossil would ordinarily be considered the age of the rock in which it was entrained. A common exception is where burrowing organisms, such as snails and worms, excavate their way into a soft rock. But even in these cases, their age would not be too different (in geological terms) from the rock age. The age of a rock may be determined by radio isotope dating, or more commonly and cheaper, by stratigraphy.
To determine the absolute age of rocks and fossils geologists use?
They would look for evidence of index fossils, those of certain rapidly evolving creatures that lived during a specific time period. This method is called relative dating. For a closer estimation they would be able to date the rock using radiometric techniques that base its age on the degree of isotope decay . This method would reveal the much more specific absolute age.
Why would uranium-238 not be useful in determining the age of a spear that is thought to be 5000 years old?
Uranium dating is useful for long periods of time - e.g. 109 years. For fossils is recommended the method with 12C.
How do people know dinosaurs lived?
Our most provident evidence would be carbon dating and fossils.
Which radiometric-dating method would be most apprioate for dating artifacts found at effi gy mounds?
Carbon-14 dating would be the most appropriate radiometric dating method for dating artifacts found at effigy mounds. This method is commonly used for dating organic materials such as wood, charcoal, or bone, which are typically found in archaeological sites like effigy mounds.
Why are their so many well-preserved fossils?
There are so many well preserved fossils because there are so many fossils, some will be well preserved. In certain locations at certain times the conditions will be right for preserving living tissues.
Is a mammoth in frozen ice a trace fossil?
No. A mammoth trapped in ice is a body fossil. Trace fossils are evidence of life but not part of the animal itself. Examples of trace fossils are footprints, nests, worm burrows, teeth marks etc. Coprolites (fossilized Dung) in the strictest sense are also trace fossils. Eggs, teeth, bones, skin, hair, feathers etc are all body fossils.
Could a woman who lived fifteen thousand years ago found frozen in a glacier be considered a fossil?
No. The ice would have preserved her body, "locking" her in her fleshy state, mummifying her naturally. The woman would be mummified, not fossilised. Also, fossils are found in rocks - glaciers are made of ice.
How would a geologist determine the age of rock layers and fossils if the geologist found a never before seen rock layer that contain fossils?
First step would be relative-dating: examining the new unit in the context of known rocks above and below it. Then look for correlative formations & fossils elsewhere.
Can you use radiocarbon dating on shale containing leaf fossils?
No,fossilsare just the impressions of an organism engraved on geologic material (rock, sediment, resin etc). Scientists useradiometric datingto date these types of materials.
What method would archaeologists use to date the remains of cro-magnons?
Radiocarbon dating.
What would be the two methods of dating fossils and explain each?
relative and absolute. relative is determining the relative order of past events, without necessarily determining their absolute age. Absolute is the process of determining an approximate computed age in archaeology and geology.
Would strontium-90 be useful for determining the age of fossils explain why or why not?
Strontium-90 would not be useful for determining the age of fossils because it has a relatively short half-life of about 29 years, which means it decays too quickly to be effective for dating ancient fossils. Fossils are typically millions of years old, so isotopes with longer half-lives, like carbon-14 or uranium-238, are more suitable for dating. Additionally, strontium-90 is primarily produced from nuclear reactions and is not naturally occurring in significant amounts in geological contexts.
