Mesozonic era:

1. describe some of the main geologic events occurring during this geologic period. this would include formation of mountains, opening of oceans, crunching continents, volcanic activity, major deposition of sediments, major structures eroded, etc.

2. describe the position of the continents during this period. where was our region with respect to the equator?

3. what types of animals lived during this geologic era?

4. what are the major types of plants that lived during your era?

1. Describe some of the main geologic events occurring during this geologic period. This would include formation of mountains, opening of oceans, crunching continents, volcanic activity, major deposition of sediments, major structures eroded, etc.  

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.