Table 2.

List of sills with finger, step and bridge features seismically detected in the Wichianburi Sub-basin

Sill numberAreaSill sheetMagma flow directionOrientation of fingers and steps
GF34, 35, 38, 41NEStep and broken bridgeNNE–SSW and E–WNNE–SSW, ESE–WNW, E–W
GF1Central basinFingerN–SN–S

These features are present in the sub-ophitic gabbro igneous group F (16 Ma). Magma flow direction is inferred from the trend of fingers and steps.