Flipping through field notebooks…
Mineral formation from ascending hydrothermal solutions
Cycles of sea level rise and fall that control sediment deposition patterns in marine basins
Deposition of minerals in pre-existing fractures and fissures
The spatial distribution of different mineral assemblages around a hydrothermal center
Local concentrations of ore minerals within veins
The sequence of mineral formation and deposition in ore deposits
The influence of geological structures like fractures and faults on ore deposit formation