0
The strata of sedimentary rock can contain fossils which are peculiar to a specific geologic time. These fossils are referred to as index fossils. Some rock layers also record events such as meteor strikes and periods of volcanism through the deposition of sediments. Igneous rocks in particular contain certain mineral crystals which can be used to provide a radiometric fingerprint of their period of formation.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Explain how geologic time is recorded in rock layers?
The strata of sedimentary rock can contain fossils which are peculiar to a specific geologic time. These fossils are referred to as index fossils. Some rock layers also record events such as meteor strikes and periods of volcanism through the deposition of sediments. Igneous rocks in particular contain certain mineral crystals which can be used to provide a radiometric fingerprint of their period of formation.
What are two ways that a rock layer can cause a gap in geologic record?
When rock layers are eroded or when a sediment is not deposited for a long period of time.
How is the geologic column in relative dating?
The geologic column is the result of the core sample showing layers of artifacts and material. Since some of these can be carbon dated, a relative time period can be established.
How the relative age of a fossil is determined by studying layers of rock?
It is determined because in layers of rocks the fossils are found so the layers of rocks give information to the scientist about the age of a fossil so like that the relative age of a fossil is determined.
Compare geologic time with geologic column?
a geologic time scale has eras, made up of periods, epochs, etc. hope this helps! :D
Diffrenciate geologic time with geologic column?
Geologic column is an ordered arrangement of rock layers that is based on the relative age of the rocks. Geologic time is the time IN the geologic column.
Explain how geologic time is recorded in rock layers?
The strata of sedimentary rock can contain fossils which are peculiar to a specific geologic time. These fossils are referred to as index fossils. Some rock layers also record events such as meteor strikes and periods of volcanism through the deposition of sediments. Igneous rocks in particular contain certain mineral crystals which can be used to provide a radiometric fingerprint of their period of formation.
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
What are two ways that a rock layer can cause a gap in geologic record?
When rock layers are eroded or when a sediment is not deposited for a long period of time.
Which time scale divided the history of earth into erasperiodsand epochs?
The geological time scale is the history of the earth. This is in the eras period and epochs.
Why is rock gypsum a sedimentary rock?
Gypsum is a mineral that was formed by layers of sediment , fine particles, that were deposited over a period of time, and then subjected to geologic forces.
How is the geologic column in relative dating?
The geologic column is the result of the core sample showing layers of artifacts and material. Since some of these can be carbon dated, a relative time period can be established.
What information does the geologic time scale have?
Information on time periods in earth's history and the events that happened in those time periods, all based on the study of fossils and rock layers.
What methods did geologists use when they first developedthe geologic time scale?
Scientists first developed the geologic time scale by studying rock layers and index fossils worldwide. With this info. (information if you forget!), scientists placed Earth's rocks in order by the relative age.
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
How much geologic time do layers of rock exposed at the Grand Canyon represent?
The age of the rock layers exposed in the Grand Canyon range from 240 million years to 1,800 million years in age. The surface feature known as the Grand Canyon is thought to be less than 17 million years old.
How did geologists estimate the aging of rock layers before radioactivity?
The rock layers were simply assigned geologic period classifications based on index fossils. Little was know about the true age of the rock, only that they were quite old based on the appearance of the fossils compared to existing organisms, and the knowledge that sedimentary rock formation usually took great lengths of time, and that layers of sediments were mostly cyclical in nature.
