Sediments play a big part in making which fossils?

Two common metamorphic rocks that typically lack foliation are __________ and __________.

Diagram 3.jpg What type of unconformity is present here?

Compared with mafic igneous rocks, all felsic igneous rocks

Your rock is 0.56 billion years old.  You also know that only 15/16th of the parent isotope is left in the rock.  Which isotope was used?

Which rock symbol is a pattern of random dots?

A layer of shale that contains a distinctive fossil could be used as a

Your rock contains Carbon 14 and is 22,920 years old.  How many half lives went by?

What type of basin (pictured below) contains the largest accumulation of marine sediments?

The isotopic dating of igneous rocks that cross-cut sedimentary layers makes it possible to determine __________ age for boundaries between geologic periods.