On Thursday, 10:30--11:30, we will break up into working groups.  Members will be chosen randomly from participants to ensure a mix of disciplines within each group.  We would ask that each group consider the questions that have been formulated, prioritize them, and discuss their three most important questions.  In discussing the three most important questions, each group should consider the challenges and opportunities represented, and possible solutions or paths forward.  After this, from 11:30--12:00, we will reconvene.  Each group will give a brief presentation about their prioritized list, the three most important questions, and their proposed responses.


__'''Tephra deposits: extracting information from the field and cores'''__

 # What should be recorded/observed on the field?
 # Should the uncertainty be recorded?
 # How to distinguish primary from reworked deposit?
 # What is the influence of the environment on the deposit? (e.g. how a tephra layer looks on a lake core vs a sea core vs an ice core vs ground)
 # What is the impact of time on a deposit?
 # General guideline on what to record and how to measure?



__'''Characterizing tephra deposits: mineralogy and geochemistry'''__

 # How to prepare/mount the sample?
 # Pros/cons of the different techniques and when to use them?
 # What should one be careful about (e.g. sodium)?
 # How many minimum measurements should be made?
 # Impact of time on the geochemistry?
 # How to summarize the information (e.g. statistics)?


__'''Dating tephra and tephra-bearing sequences'''__

 # How to prepare sample?
 # Which technique to use: pros/cons and when to use?
 # What should one be careful about?
 # How to report the age (e.g. uncertainties, ...)?


__'''Modelling volcanic plumes and tephra dispersal'''__

 # Why might I want to use a model of tephra dispersal?
 # Which model for what task? Pros/cons
 # What are the inputs needed for the different models?
 # What are the uncertainties in the results?


__'''Characterizing the eruption from tephra deposits'''__

 # What can we learn about the eruption (e.g. height, style, ...)?
 # What inputs are needed (e.g. especially primary vs reworked thickness)?
 # What are the uncertainties?
 # Why is this important?
 # General guidelines?


__'''Correlation'''__

 # How do I correlate? Which techniques?
 # What is the proper use of statistical tools and use of uncertainties?
 # Intercontinental correlation -- how does this work best?
 # What is the importance of using the same vocabulary and similar ways to process information?
 # How can the data best be made available to archeologists, paleoclimatologists, etc., who need a correlation target?


__'''Tephra databases and eruption catalogs'''__

 # What is the importance of databases and catalogs?
 # What is to be recorded in them?
 # How do I reference authors?
 # What is the link between the different databases/catalogs?
 # How can we let others know about them?