Introduction to Searches

Apart from the bibliographic database, all of the searches of Tephrabase are divided between those from Iceland and north-west Europe and those from central Mexico. Before proceeding, select which area you want to search.

Each search form has full details about how to use the database. If you have any problems please get in touch.

Bibliographic Searches

References

The reference database currently holds over 1000 references on tephrochronology, volcanology and related topics such as palaeoenvironmental studies. These include references to various parts of the world but there is a concentration on Iceland and Mexico.

Iceland and north-west Europe Searches

Sites	The query form available from this page will allow searches of the database on locations in Iceland and north-west Europe. For example, you can obtain lists of all the tephra layers in a particular country or the sites where a particular tephra layer is found. Once you have identified the tephra layers you want, geochemical data tables can then be obtained. Details about volcanic systems are also available.
Geochemical	Two types of query are available from here. The first one produces geochemical data tables of tephra layers at various geographical scales in Iceland and north-west Europe and the second allows tephra layers with certain geochemical characteristics to be found.
Dates	The searches available from here query the database to give indications of possible eruptions which have occurred and tephra layers which were deposited during particular time periods.
Eruption	Searches can be made from here on particular eruptions from volcanic systems in Iceland. This is particularly suitable for eruptions during the last 1100 years.
Volcanic systems	Searches can be made from here on particular volcanic systems in Iceland. Information on each volcanic system is available.
Tephramap	This will show a map of the sites with tephra layers stored in Tephrabase.

Central Mexico

The searches available from here are similar to the ones for north-west Europe. There are fewer sites than in Europe. [Note that this part of Tephrabase is currently being improved and Google Maps will be added shortly]

Sites

The search forms available from this page will allow searches of the database on all sites in central Mexico with tephra layers. At the moment sites are only available for some tephra layers found in the Basin of Mexico and the Toluca Basin. Geochemical data is available for those containing tephra layers.

Geochemical

Two types of query are available from here. The first type produces geochemical data tables of tephra layers at various geographical scales in central Mexico and the second allows tephra layers with certain geochemical characteristics to be found.

Dates

The searches available from here query the database to give indications of possible eruptions which have occurred and tephra layers which were deposited during particular time periods. [WILL BE AVAILABLE SOON]

Eruption

Searches can be made from here on particular eruptions from central Mexican volcanoes. This is particularly suitable for eruptions during the last 500 years. Eruptions occurring during the historic period can now be searched for by date. [WILL BE AVAILABLE SOON]