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age
Many geologists consider what you call the "last ice age" to be the last glacial of the present Ice Age, with the ice retreat starting only about 10-12ka. There was no mass extinction. A good many species did migrate or disappear altogther as the ice retreated, but in no way was it a mass extinction.
a meridian
It all depends on your age, how long you have had trouble with it and the results of blood tests that help determine what is happening. However Rheumatologist do use xrays to determine the progress and the damage being caused by the disease.
Or Bering Strait was submerged by waters from melting glaciers after the ice age. Since no humans were there back then or there to record and study the land we really have no idea what happened but what i just gave you is the assumption that many geologists have made about the whole affair.
Geologists determine absolute age of rocks by using radioactive dating.
- to determine the chemical nature of a rock - to determine the age of a rock by comparison
original horizontality
Radioactive dating is used to determine the absolute ages of rocks. By Jennifer Palos
Relative Dating is the technique used to determine the age of rock deposits by natural forces.
Radioactive dating is used to determine the absolute ages of rocks. By Jennifer Palos
they find the hard part of the fossil
Geologists determine the absolute age of rocks using radiometric dating techniques, such as carbon dating or uranium-lead dating. These methods rely on measuring the proportions of radioactive isotopes and their decay products in the rocks to calculate how long ago they formed.
carbon-12, potassium, and argon
The age of whatever is being tested [dated]
Radioactive dating is used to determine the absolute ages of rocks. By Jennifer Palos
Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in. The age of formations is marked on a geologic calendar known as the geologic time scale. Development of the geologic time scale and dating of formations and rocks relies upon two fundamentally different ways of telling time: relative and absolute.