Rift margin, well located
Rift_WL
Caldera, well located
Caldera_WL
Rift margin, gravity interpretation
not used
Rift margin, approximately located, queried
Rift_ALQ
Rift margin, approximately located
Rift_AL
Caldera, approximtely located
Caldera_AL
Caldera, approximately located, queried
Caldera_ALQ