1. Input files and corresponding output files for TOUGH2 numerical simulations designed to test possible pre-eruptive and syneruptive thermohydrologic processes at maar/diatreme volcanoes, using a model setup based on lithological characteristics of Colton Crater and Rattlesnake Crater in northern Arizona. - Cases 1.1 and 2.1 are base cases, others test input parameter variations. - Cases 3A-3C are designed to simulate progressive diatreme growth 2. Heat flow calculation for input files