>>2585854as
>>2586754 said, find out about the rocks in your area, If you live near a larger city they might have local groups that do meet ups and fieldtrips within the area. For example, here in the Dallas area we have the Dallas Paleontological Society, it free to go to their meetings and is a great place to learn about the local findings.
http://www.thefossilforum.com/ might also be a great place to start looking as well, I hope this information helps you out in your endeavors.
On another note, here are some oysters that I have yet to get nan id to just yet. Eagle Ford Auston chalk boundary zone, Collon Co. Texas
