Baldovia14idn
Answered

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1. What is the
purpose
of stratigraphy?
2. What was the condition
of Earth in the Beginning?
3. Define relative geologic
age.​

Sagot :

Jhamela14idn

Answer:

1. Stratigraphy, scientific discipline concerned with the description of rock successions and their interpretation in terms of a general time scale. It provides a basis for historical geology, and its principles and methods have found application in such fields as petroleum geology and archaeology. And that is its purpose.

2. The early Earth's atmosphere had a very low concentration of oxygen compared to today. 2.4 billion years ago, the oxygen concentration in the atmosphere was less than one part per billion and the iron concentration in the ocean was much higher than today.The early Earth had no ozone layer and was probably very hot. The early Earth also had no free oxygen. Without an oxygen atmosphere very few things could live on the early Earth. Anaerobic bacteria were probably the first living things on Earth.

3. The geologic age of a fossil organism, rock, geologic feature, or event, defined relative to other organisms, rocks, features, or events rather than in terms of yearRelative age is the age of a rock layer (or the fossils it contains) compared to other layers. It can be determined by looking at the position of rock layers.

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