__'''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__''' # Which model for what? Pros/cons # What are the inputs needed? # Uncertainties in the results # Why are these models used? __ '''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 to correlate? Which techniques? # Use of statistical tools and use of uncertainties # Intercontinental correlation # Importance of using the same vocabulary and similar ways to process information # Application to archeology '''__Tephra databases and eruption catalogs__''' # Importance of databases and catalogs? # What to record in them? # How to reference authors? # How to link the different databases/catalogs? # How to advertise them?