0
A geologic time scale is a scale that was developed by scientists to show when and for how long different events happened in the Earth's history. Some events included on the scale are when plant life appeared, when mountains were formed and when dinosaurs roamed the Earth. The geologic time scale divides Earth's history into periods such as the Cretaceous, Jurassic and Triassic periods.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What is the approximate length of the geologic time scale?
The presence or absence of fossils has been used to compare the relative ages of rocks around the world and to arrange sedimentary rocks into a geologic time scale. Eons are the largest intervals of the time scale and range from 540 to 2,050 million years in length
Why is geologic time scale used to show earths history?
because the time span of earth past is so great geologic
What is the purpose of a geological time scale?
The reason Geologic Timescales are used are to give sense of what time begining from 4.5 billion years ago, and the satges through Evolution. That's how it's possibly percieved, I am not accuratly certain, so do research and come up with a possible answer to counter my statement.
What was the geologic time scale based upon?
The decay of radiactive isotopes of many different elements whose rate of decay is known, including Uranium-235 and Uranium-238, and Potassium-40. They compare the amount of the parent isotope to the amount of it's stable daughter product.add. The geological time scale is based upon important interruptions to the fossil cohort. Major interruptions are thought to indicate catastrophic and world wide events. In recent times, these events have been able to be dated accurately, using among other things, radioactive dating.
What is an organism used to identify a specific geologic time period called?
It's called an index fossil.
What methods did geologist used when they first developed the geologic time scale?
The methods the geologists used when they first developed the geologic time scale. Were studying rock layers and index fossils worldwide. By Patrick
Why is the geologic time scale used to show the Earth's history?
because the time span of earth past is so great geologic
How is the geologic scale used?
rectum
What is the approximate length of the geologic scale?
The presence or absence of fossils has been used to compare the relative ages of rocks around the world and to arrange sedimentary rocks into a geologic time scale. Eons are the largest intervals of the time scale and range from 540 to 2,050 million years in length
Why is the geologic time scale used the show earth's history?
becase scientists use it to place history in order
Scientists used major changes in life forms in the fossil record to form the geologic time scale?
yes
The standard method used to divide the earths long natural history into managable parts?
geologic time scale
What is the approximate length of the geologic time scale?
The presence or absence of fossils has been used to compare the relative ages of rocks around the world and to arrange sedimentary rocks into a geologic time scale. Eons are the largest intervals of the time scale and range from 540 to 2,050 million years in length
Why is geologic time scale used to show earths history?
because the time span of earth past is so great geologic
What methods did geologists use when they first developed the time scale?
The methods the geologists used when they first developed the geologic time scale. Were studying rock layers and index fossils worldwide. By Patrick
What dating were used to determine the subdivisions of geologic time?
Rocks contain what we call "Clocks" these can be minerals which are resistant to weathering such as Zircon. They are used to estimate absolute ages of Geological structures.Using these clocks combined with the Geological events i.e drastic Changes to the earths environment leading especially to extinction of specific animal species eg.Dinasours and the type of Organisms that existed at that time,the geological time scale is born
How can the principles of stratigraphy be used to do relative age dating?
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.
