Geology of the Selene perlite deposit in the northern Sierra Madre Occidental, northeastern Sonora, Mexico

You must do an abstract of the next paper. The abstract must incluied the next questions:

1. What is Selene perlite and how did it form?

2. How the authors document the deposit of perlite?

4. What's the objective of the investigation?

5. What's the geology around the Selene perlite prospect?

6. How many perlite's bodies did they recognize? 

7. How's texture of the rocks?

8. What's the lithostratigraphy observed for the authors? 

8. In the figure 9, why do you think obsidian is next to perlite?

9. What are your and their (authors) conclusions?