Help for PetDB

Setting constraints on a sample selection

The database contains chemical data for rock samples including volcanic, intrusive and metamorphic and mantle rocks. Most samples are either mid-ocean ridge basalts, abyssal peridotites, or mantle xenoliths, but PetDB also contains data for samples from other tectonic settings.

To query the database for chemical values, you first need to select samples in which you are interested. The following criteria can be used (you can use one criteria or a combination of criteria):