What is another word for rock layers?

State a hypothesis with a numerical estimate of the calories contained within a peanut based on the nutritional information on the package label combined with what you have learned in this lesson about fuel efficiency and calorimeters.

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

The oldest seafloor in the atlantic ocean is located closest to the edge of the continents. explain how this age can be used to figure out when north america first began to separate from europe