While looking at a rock under a microscope you observed bits of shell. what organic sedimentary rock might you have been looking at?
a. coal
b. chert
c. quartz
d. limestone

While looking at a rock under a microscope you observed bits of shell. The organic sedimentary rock you might have been looking at is D. limestone.
Limestone is the only one among these rocks that is formed from the accumulation of shell, coral, algal, and fecal debris. 

Di think it’s d shidd