Science questions about rock layers...?

Question

Could someone help me with this questions thank you sooo much..

A scientist is studying a section of exposed sedimentary rock layers, that are near a fault line (a place where the crust is actively moving and broken). Using the geologic principles discussed in this lesson, name the principle that you think could explain this observation and give a reasonable explanation as to why you think so.
Observation:
Layer A - top layer - contains fossils dated at 20,000 years old.
Layer B - next layer down - contains fossils dated at 100,000 years old
Layer C - third layer down, contains fossils dated at 400, 000 years old
Layer D - bottom layer contained fossils 800,000 years old.

Answer 1

While it is true that the layers do conform to the law of super position which states In its plainest form, : layers are arranged in a time sequence, with the oldest on the bottom and the youngest on the top, unless later processes disturb this arrangement. The law was first proposed in the 17th century by the Danish scientist Nicolas Steno. With that said, you should for the sake of the interpretation look for discontinuities that are indicative of erosional events.

Answer 2

The farther down you go, the older the fossils. This is because ground builds up. It starts with the older fossils. Then over time more dirt is spread ovet those fossils and new fossils are layed. Layerong the fossils for youngest, at the top, to oldest, at the bottom.

Although seeing form where the questo states "Using the geologic principles discussed in this lesson", you should probably know that.

Answer 3

The part of the question referring to fault is not important in explanation. The first answer was correct.

Answer 4

How do you know how many years old the fossils are?