Fossil Homework 9/20/10

I think this fossil is an original remain because it looks as though it is unchanged, it also looked like it was preserved in amber which would mean that it was not replaced by other molecules.

I think the shell is a Cast or Mold because I don't think that it's cells were replaced by others overtime. I think something surrounded it and encased it in stone so it became a mold.

Strata and Relative Time homework

Youngest:

I think 3 is the youngest because intrusions are younger than the layers of rock they cut through and it cuts through the top layer of rock which is the youngest.

I think 1 is the second youngest because it is the top layer of rock, which according to the laws of superposition means it is the youngest.

I think 6 is the next youngest because it is second closest to the top of the rock formation.

Then I think it is 5 because it is next closest to the top.

Then it is 4 because it is under five but not quite at the bottom.

Last is 2 because it reaches the bottom of the rock formation which makes it the oldest.