Is anybody going to say the "S" word?
Sedimentary.
Sedimentary, dear Watson, sedimentary rock.
Sedimentary rock? Hmmm?
Robert? Are you going to say the "F" word?
[hint hint hint] Fos....fos...fos...
Where else are you going to find 'two billion year old' microfossils, but in sedimentary rock?
