Phacops logani is a specific trilobite this particular type only lives during the early devonian age to buy it also was found to be widespread throughout north america question can this fossil qualify to be index fossil

Which type of seismic waves are confined at the surface

The first mathematical theory of tides was introduced by: galileo kepler newton cousteau

The graph shows the number of employed workers in the united states in nonfarm jobs from 2008 to 2013. the best conclusion that can be drawn from the graph is that the number of nonfarm jobs remained consistent over time. started going down in 2008. went up every year since 2008. started going down in 2010.