Question

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.

Answer 1

this is second part

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 8