Minerals.
I bubble with acid.
What is calcite?
A good index fossil.....
Lived for a short time and was wide spread.
Shale forms...
where are the bottoms of oceans and what is clay.
The element for dating bones of early humans.
What is carbon 14?
I am an ore of lead.
What is Galena?
the earliest flowiring plants emerged in the.....
Early Cretaceous.
I am made of compacted plant remains.
What is coal?
Potassium-40 breaks down into theses elements.
What are calcium 40 and argon 40.
I am used in jewelry and the ny state mineral.
What is Garnet.
Trilobites went extinct during the......
what is the early enpermian?
The difference between breccia and conglomerate.
It's all in the fragments.
this element is used for dating the earliest rocks.
what is Rubidium 87.
I am commonly used in drywall and plaster of paris.
What is Selenite Gypsum.
the placoderm fish lived between the...
What is the late Silurian to the late Devonian.
We are made of________sediments.
What is deposited?
The mineral extracted as part of the radioactive dating.
What is zircon?
I cleave at 59 degrees and 124 degrees.
What is Amphibole? (commonly Hornblende)
The grenville mountains were uplifted during the.....
What is the middle Proterozoic?
Limestone is composed of_________.
What is Calcite?
Rubidium has a half life of.... ( Answer cannot be in scientific notation.)
49,000,000,000